Question

A) 7a – 5 = 4a – 10
B) 3.(3m + 5) = 10 – (3m – 5)
C) 4.(2x+6) = 3.(2x-8)

Answer 1

Resposta:

a) $a=\frac{-5}{3}$

b) $m=\frac{-10}{12}$

c) $x=-24$

Explicação passo-a-passo:

a)

$7a-5=4a-10\\7a-4a=-10+5\\3a=-5\\a=\frac{-5}{3}$

b)

$3(3m+5)=10-(3m-5)\\9m+15=10-3m+5\\9m+3m=5-15\\12m=-10\\m=\frac{-10}{12}$

c)

$4(2x+6)=3(2x-8)\\8x+24=6x-24\\8x-6x=-24-24\\2x=-48\\x=-24$