Question

Раскройте скобки и упростите выражение: 1) 48 - (17+а) 2) а - (34 +22) 3) 116 - (98+а) 4) (385+а) - 213 5) 348+(х - 48) 6) 39 - (88 - х) 7) 2(3+х) - 5 8) 6 - 2(5+а) 9) 4х +3(2+х)

Answer 1

Ответ:

1)

$48 - (17 + a) = 48 - 17 - a = 31 - a$

2)

$a - (34 + 22) = a - 56$

3)

$116 - (98 + a) = 116 - 98 - a = 18 - a$

4)

$( 385+ a) - 213 = 385 + a - 213 = 172 + a$

5)

$348 + (x - 48) = 348 + x - 48 = 300 + x$

6)

$39 - (88 - x) = 39 - 88 + x = - 49 + x$

7)

$2 \times (3 + x) - 5 = 6 + 2x - 5 = 1 + 2x$

8)

$6 - 2 \times (5 + a) = 6 - 10 - 2a = - 4 - 2a$

9)

$4x + 3 \times (2 + x) = 4x + 6 + 3x = 7x + 6$