Question

Resolva as seguintes equações
a) y + 9 = 13
d) 7x = -21
b) x - 32 = 15
e) 8x = 64
c) 3x = -36

Answer 1

a) $y+9=13$

$y=13-9$

$y=4$

d) $7x=-21$

$x=-\frac{21}{7}$

$x=-3$

b) $x-32=15$

$x=15+32$

$x=47$

e) $8x=64$

$x=\frac{64}{8}$

$x=8$

c) $3x=-36$

$x=-\frac{36}{3}$

$x=-12$