Відповідь:
1) -2x = 6-7*(x+2)
-2x = 6-7x-14
-2x = -8-7x
-2x+7x = -8
5x = -8
x = -1,6
2) 3x-(5+x) = x-12
3x-5-x = x-12
2x-5 = x-12
2x-x = -12+5
x = -7
3) -2*(-4x+7) = -9+11
8x-14 = 2
8x = 2+14
8x = 16
x = 2
Відповідь:
1) -2x = 6-7*(x+2)
-2x = 6-7x-14
-2x = -8-7x
-2x+7x = -8
5x = -8
x = -1,6
2) 3x-(5+x) = x-12
3x-5-x = x-12
2x-5 = x-12
2x-x = -12+5
x = -7
3) -2*(-4x+7) = -9+11
8x-14 = 2
8x = 2+14
8x = 16
x = 2