Question

Resolva as equações de 1° grau com cálculo

a)8x - 43 = 29
b)x+30=40
c)30+10+2x=10
d)10x-20=40+50
e)3x-16=14-7x​

Answer 1

A)

$8x - 43 = 29 \\ 8x = 72 \\ x = \frac{72}{8} = 9$

B)

$x+30=40 \\ x = 10$

C)

$30+10+2x=10 \\ 2x = - 30 \\ x = \frac{ - 30}{2} = - 15$

D)

$10x-20=40+50 \\ 10x = 110x = \frac{110}{10} = 11$

E)

$3x-16=14-7x \\ 10x = 30 \\ x = \frac{30}{10} = 3$