Question

calcular a medida de x na equação x+15=3x-5

Answer 1

x + 15 = 3x - 5
x -3x = -5-15
-2x= -20
x = 10

Answer 2

x+15=3x-5
x-3x=-5-15
-2x=-20•(-1)
2x=20
x=20/2
x=10