Question

13. 14. 15. a) - (1 - x) - (51 + x) = b) - (a - x - 3) - (x - a + 2) = c) (a + 33 - a) - (33 + x) = d) - (243 + x - b) - (243 + b - x) = e) - (153 - x + 1) - (x - a - 253) = (a - x) - (75 + x) + 5a - 51 = f) Раскройте a) -5(x + 3) + 4(x - 2) - 6(2x + 1) = b) 2(6x - 5) - 4(2x - 2) = c) 5(5y - 3) - 5(3 + 6y) = скобки и упростите выражение: d) 2(x + 3y) – 3(2x – 5y) = e) 2a-(7 - 2a) = f) -2 -2(-a + 7) + 14 = Упростите выражение, раскрыв скобки, и выполните там, где возможно, действия: a) - (11 - 2x) - (65 + x) = b) - (a - 4x - 23) - (2x - a + 72) = c) (а + 58 - a) - (77 + 3x) = d) - (756 + x - b) - (458 + b - 2x) = К- f) e) - (748 - x + 1) - (5x - 2a - 478) = - (8a - x) - (87 + x) + 5a - 78 = c) (8a - 1)•(-6) + (За – 7)•(-2) = d) - 5•(-2x + 4) - (10 – x) = e) 3(3y + 4) + 4(2y – 1) = g) - (a - x) - (46 + x) + 7a - 84 = h) (2b - x) - (5a - 3x) + (a - 2b) = i) - (a + 57) - (x - 4a) - 75 + x = j) (486 + 11) - (b + 4563) + (5b - 181) = Раскройте скобки и упростите выражение: a) -8•(2 - 2y) + 4•(3 – 4y) = i) - 5(5 - x) - 4x = b) (3x - 11)•2 - 5•(4 - 3x) = j) 4(3x - 6) - 2(7x - 21) = k) 5(3y - 2) - 7(2y – 3) = 1) 5m - (3m + 5) + (2m - 4) = f ) - 3(3y + 4) – 4(2y – 1) = g) 8(3 - 2x) + 5(3x + 5) = 3(y - 5) - 2(y - 4) = h) k) - (153 - x + 2a) - (x - 7486 - 4a) - a = 1) - (a + 245) - (3x - 2a) - 213 + 3x = m) -5(x + 3) + 4(x - 2) - 6(2x + 1) = n) 2x-3-(3x - 2) - 6x = o) 4(7 - 5x) - (12 - 20x) = p) (3x + y) - (- x - 4y) =​
Помогите решить 50 баллов дам

Answer 1

Ответ:

a) -(1 - x) - (51 + x) = -1 + x - 51 - x = -52b) -(a - x - 3) - (x - a + 2) = -a + x + 3 - x + a - 2 = 1c) (a + 33 - a) - (33 + x) = 0 - 33 - x = -33 - xd) -(243 + x - b) - (243 + b - x) = -243 - x + b - 243 - b + x = -486e) -(153 - x + 1) - (x - a - 253) = -153 + x - 1 - x + a + 253 = a + 99f) (a - x) - (75 + x) + 5a - 51 = a - x - 75 - x + 5a - 51 = 6a - 2x - 126a) -5(x + 3) + 4(x - 2) - 6(2x + 1) = -5x - 15 + 4x - 8 - 12x - 6 = -13x - 29b) 2(6x - 5) - 4(2x - 2) = 12x - 10 - 8x + 8 = 4x - 2c) 5(5y - 3) - 5(3 + 6y) = 25y - 15 - 15 - 30y = -5y - 30d) 2(x + 3y) – 3(2x – 5y) = 2x + 6y - 6x + 15y = -4x + 21ye) 2a - (7 - 2a) = 2a - 7 + 2a = 4a - 7f) -2 - 2(-a + 7) + 14 = -2 + 2a - 14 + 14 = 2aa) -(11 - 2x) - (65 + x) = -11 + 2x - 65 - x = x - 76b) -(a - 4x - 23) - (2x - a + 72) = -a + 4x + 23 + 2x - a - 72 = 6x - 49c) (a + 58 - a) - (77 + 3x) = 58 - 77 - 3x = -19 - 3xd) -(756 + x - b) - (458 + b - 2x) = -756 - x + b - 458 - b + 2x = x - 1214e) -(748 - x + 1) - (5x - 2a - 478) = -748 + x - 1 - 5x + 2a + 478 = 3x + 2a - 271f) -(8a - x) - (87 + x) + 5a - 78 = -8a + x - 87 - x + 5a - 78 = -3a - 165c) (8a - 1)•(-6) + (За – 7)•(-2) = -48a + 6 + 6

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