Question

calcule as equações:A)3x+4=16B)5x+18=3C)2x+5=15D)4x+10=2x+12E)6x+8=18+2F)10X+2=2X+66

Answer 1

A)
3x + 4 = 16
3x = 16 - 4
3x = 12
x = 12 / 3
x = 4

B)
5x + 18 = 3
5x = 3 - 18
5x = -15
x = -15 / 5
x = -3

C)
2x + 5 = 15
2x = 15 - 5
2x = 10
x = 10 / 2
x = 5

D)
4x + 10 = 2x + 12
4x - 2x = 12 - 10
2x = 2
x = 2 / 2
x = 1

E)
6x + 8 = 18 + 2
6x + 8 = 20
6x = 20 - 8
6x = 12
x = 12 / 6
x = 2

F)
10x + 2 = 2x + 66
10x - 2x = 66 - 2
8x = 64
x = 64 / 8
x = 8

Answer 2

A)
3x + 4 = 16 
3x = 16 - 4
3x = 12
x = 12 / 3
x = 4

B)
5x + 18 = 3
5x = 3 - 18
5x = -15
x = -15 / 5
x = -3

C)
2x + 5 = 15
2x = 15 - 5
2x = 10
x = 10 / 2
x = 5

D)
4x + 10 = 2x + 12
4x - 2x = 12 - 10
2x = 2
x = 2 / 2
x = 1

E)
6x + 8 = 18 + 2
6x + 8 = 20
6x = 20 - 8
6x = 12
x = 12 / 6
x = 2

F)
10x + 2 = 2x + 66
10x - 2x = 66 - 2
8x = 64
x = 64 / 8
x = 8