\[2x+9=4\]
1
Subtract 99 from both sides.
2x=4−92x=4-9

2
Simplify  4−94-9  to  −5-5.
2x=−52x=-5

3
Divide both sides by 22.
x=−52x=-\frac{5}{2}

Done

Decimal Form: -2.5

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