Question

resolva as equaçoes e determine o valor de cada incógnita:
a.4+8=-5
b.3a-4=a+1
c.9y-11=-2

Answer 1

Resposta:

a.4+8=-5

$4 + 8 = - 5 \\ 4 + 8 + 5 \\ 12 + 5 \\ = 17$

b.3a-4=a+1

$3a - 4 - a - 1 = 0 \\ 2a - 5 = 0 \\ 2a = 5 \\ \\ a = \frac{5}{2}$

c.9y-11=-2

$9y - 11 + 2 = 0 \\9y - 9 = 0 \\ 9y = 9 \div (9) \\ y = 1$