Question

resolva as seguintes equações do 1°grau​

Answer 1

A. $x+7=12$

$x=12-7\\x=5$

B. $x+8x=27$

$9x=27$

$x=\frac{27}{9}$

$x=3$

C. $11x-5=7x+3$

$11x-7x=3+5\\4x=8$

$x=\frac{8}{4}$

$x=2$

D. $5y+3=38$

$5y=38-3\\5y=35$

$y=\frac{35}{5}$

$y=7$

E. $7m+8=15m$

$7m-15m=-8$

$-8m=-8$

$m=1$