\[3x+6=4\]
1
Subtract 66 from both sides.
3x=4−63x=4-6

2
Simplify  4−64-6  to  −2-2.
3x=−23x=-2

3
Divide both sides by 33.
x=−23x=-\frac{2}{3}

Done

Decimal Form: -0.666667

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