Question

Resolva
3x/7=6
3x-15/2=8
8x+5/3= -1
2x+5/4=2

Answer 1

3x/7=6 > 3x = 42 > x = 12

3x-15/2=8 > 6x = 31 > x = 31/6 > x =~ 5,17

8x+5/3=-1 > 24x = -1-3 > 24x = -8 > x = -1/3

2x+5/4=2 > 8x = 8-5 > x = 3/8

Answer 2

3x/7=6
3x= 6.7
x =42/3
x = 14

3x-15/2=8
3x = 8 +15/2
3x = (16 + 15)/2
x = 31 / (2.3)
x = 31/6

8x+5/3= -1
8x = -1 -5/3
8x = -3/3 -5/3
8x = -8/3
x = -8/24
x = -1/3

2x+5/4=2
2x = 2 + 5/4
2x = (8+5)/4
2x = 13/4
x = 13/8