Question

resolver las siguientes ecuaciones:
a)9+7x-3-4x=27
b) 8x-7+x=5x+21

Answer 1

Resolver.

9 + 7x - 3 - 4x = 27
3x + 6 = 27
3x = 27 - 6
3x = 21
x = 21/3
x = 7


8x - 7 + x = 5x + 21
9x - 7 = 5x + 21
9x - 5x = 21 + 7
4x = 28
x = 28/4
x = 7