\[7x+8=4\]
1
Subtract 88 from both sides.
7x=4−87x=4-8

2
Simplify  4−84-8  to  −4-4.
7x=−47x=-4

3
Divide both sides by 77.
x=−47x=-\frac{4}{7}

Done

Decimal Form: -0.571429

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