Question

Determine o valor do "x" em cada equação:
a) 5x+17=4x-2

b)x+3x-10=2x+5+x

c)2a+13=a-7

Answer 1

a)
5x+17=4x-2
5x-4x=-2-17
x=-17

b)
x+3x-10=2x+5+x
4x-10=3x+5
4x-3x=5+10
x=10

c)
2a+13=a-7
2a-a=-7-13
a=-20