Question

resolva a equação
3× +9=12
3y+5=12-y
2×-22=7×-5
12×-(2×+5)=10
×+(×+8)=10​

Answer 1

Resposta:

3× +9=12

x=(12-9)÷3

x=1

3y+5=12-y

3y+y=12-5

y= $\frac{7}{4}$

2×-22=7×-5

2x-7x=-5+22

-5x=17 (-)

x=$\frac{-17}{5}$

12×-(2×+5)=10

12x-2x-5=10

10x=15

x= $\frac{15}{10}$ simplificando x= $\frac{3}{2}$

×+(×+8)=10​

2x=10-8

x= $\frac{2}{2}$ = 1

Answer 2

Resposta:

Explicação passo-a-passo:

Hzcn