3x - (3x-78) = x to solve the equation

3x - (3x-78) = x to solve the equation

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3x-3x+78=x
x=78
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Solution equation: 3x-60 = x + 60

3x-60=x+60
3x-x=60+60
2x=120
x=60

The solution equation (4 + x) * 2 = 16 78-8x = 54 92-x = 3 * 15 x * 3.2 = 22.4 3x-6 = 6.6 54-3x = 24

（4+x）*2=16
4+x=8
x=4
78-8x=54
8x=24
x=3
92-x=3*15
x=92-45
x=47
x*3.2=22.4
x=22.4÷3.2
x=7
3x-6=6.6
3x=6+6.6
3x=12.6
x=4.2
54-3x=24
3x=54-24
3x=30
x=10

How to solve (x 40): (3x 40) = 3:4
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(x +40):(3x +40)=3:4
3(3x+40)=4(x+40)
9x+120=4x+160
5x=40
x=8