Question

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Answer 1

$- 6(x + 2) = 4x - 17 \\ - 6 \times x -6 \times 2 = 4x - 17 \\ - 6x - 12 = 4x - 17 \\ 17 - 12 = 4x + 6x \\ 5 = 10x \\ x = 5 \div 10 \\ x = 0.5$
$(18x - 19) - (4 - 7x) = - 73 \\ 18x - 19- 4 + 7x = - 73 \\ 18x + 7x - 19 - 4 = - 73 \\ 25x - 15 = - 73 \\ 25x = - 73 - 15 \\ 25x = - 48 \\ x = - 48 \div 25 \\ x = 1.92$

10x + 3(7-2x) = 13 + 2x
10x + 3*7 - 3*2x = 13 + 2x
10x + 21 - 6x = 13 + 2x
10x - 2x - 6x = 13 - 21
8x - 6x = -8
2x = -8
x = -8 ÷ 2
x = -4

-3(4-5y) + 2(3-6y) = -3,9
-3*4 - 3*5y + 2*3 - 2*6y = -3,9
-12 - 15y + 6 - 12y = -3,9
-12 + 6 - 15y - 12y = -3,9
-6 - 15y - 12y = -3,9
-6 - 3y = -3,9
3y = -3,9 - 6
3y = -9,9
y = -9,9 ÷ 3
y = -3,3