Question

×-9×=9-7 4=12×-4× 2-8=×+2× explicación detallada gracias

Answer 1

x - 9x = 9 - 7
-8x = 2
8x = -2
x = -2/8
x = -1/4

4 = 12x - 4x
-12x + 4x = - 4
-8x = - 4
8x = 4
x = 4/8
x = 1/2

2 - 8 = x + 2x
x + 2x = 2 - 8
3x = -6
x = -6/3
x = -2

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