\[15x-5(1-x)=0\]
1
Factor out the common term 55.
5(3x−1+x)=05(3x-1+x)=0

2
Divide both sides by 55.
3x−1+x=03x-1+x=0

3
Simplify  3x−1+x3x-1+x  to  4x−14x-1.
4x−1=04x-1=0

4
Add 11 to both sides.
4x=14x=1

5
Divide both sides by 44.
x=14x=\frac{1}{4}

Done

Decimal Form: 0.25

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