Question

quanto seria b) 2x − 5 = x + 1
c) 2x + 3 = x + 4
d) 5x + 7 = 4x + 10
e) 4x − 10 = 2x + 2
f) 4x − 7 = 8x − 2
g) 2x + 1 = 4x − 7

Answer 1

Resposta:

C)

$2x+3=x+4\\2x-x=4-3\\x=1$

D)

$5x+7=4x+10\\5x-4x=10-7\\x=3$

E)

$4x-10=2x+2\\4x-2x=2+10\\2x=12\\x=12/2\\x=6$

F)

$4x-7=8x-2\\4x-8x=-2+7\\-4x=5\\x=-\frac{5}{4}$

G)

$2x+1=4x-7\\1+7=4x-2x\\2x=8\\x=8/2\\x=4$