12 + X is equal to 25 x + 2x is equal to 12.6 2x / 5 is equal to 15 4x-1.6x is equal to 36 test fast point!

12 + X is equal to 25 x + 2x is equal to 12.6 2x / 5 is equal to 15 4x-1.6x is equal to 36 test fast point!

12+x=25
x=25-12
x=13
Left = 12 + 13 = 25
Right = 25
Left = right
So x = 13 is the solution of the original equation
x+2x=12.6
3x=12.6
x=4.2
Left = 4.2 + 2 × 4.2 = 12.6
Right = 12.6
Left = right
So x = 4.2 is the solution of the original equation
2x/5=15
2x=75
x=37.5
Left = 2 × 37.5 / 5 = 15
Right = 15
Left = right
So x = 37.5 is the solution of the original equation
4x-1.6x=36
2.4x=36
x=15
Left = 4 × 15-1.6 × 15 = 36
Right = 36
Left = right
So x = 15 is the solution of the original equation