Question

Assinale a alternativa correta:

2a+4= -6
y-3=2
x-1=5
-2+5y=13
x+1=3
4x-7=1​

Answer 1

Resposta:

2a= -6 - 4

2a= -2

a= -2 +2

a=0

y-3=2

y=2+3

y=5

x-1=3

x=3+1

x=4

-2+5y=13

5y=13 + 2

5y= 15

y= 15÷5

y=3

x+1=3

x=3-1

x=2

4x-7=1

4x= 1+7

4x=8

x= 8÷4

x=2