Question

x + x+ x=78/ 2x+3x+4= 189 2x+3x+4x= 189 5x-4-3x=-16 qual é os cálculos??

Answer 1

x + x + x = 78
3x = 78
x =78/3
x= 26

2x + 3x + 4 = 189
5x = 189 - 4
5x = 185
x= 185/5
x = 37

2x + 3x + 4x = 189
7x = 189
x = 189/7
x = 27

5x - 4 - 3x = -16
5x - 3x = -16 +4
2x = - 12
x = -12/2
x = -6