Question

Resolva as seguintes equações
4x + 5 = x +20
2x + 4 = 16
3x = 15
2x = 10
5x - 91 = 4x - 77​

Answer 1

4x+5=x+20

4x-x=20-5

3x=20-5

3x=15

x=15:3

x=5

2x+4=16

2x=16-4

2x=12

x=6

3x=15

x=5

2x=10

x=5

5x-91=4x-77

5x-4x=77+91

x=77+91

x=14