Question

Equação do 1°grau:
A) -x-2x-4=11
B) 4(x+1)=12
Com as contas!!!

Answer 1

A) - x - 2x - 4 = 11
- 3x = 11 + 4
- 3x = 15
x = 15/-3
x = - 5

B) 4(x + 1) = 12
4x + 4 = 12
4x = 12 - 4
4x = 8
x = 8/4
x = 2

Answer 2

A)

-x-2x-4=11

-x-2x=11+4

-3x=15(×-1)

3x=-15

x=-5

B)

4(x+1)=12

4+2x=12

2x=12-4

2x=8

x=4