Question 56440
5X-1/2X=18
4.5X=18
X=4
PROOF
5*4-1/2*4=18
20-2=18
18=18
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-8X-2X=15
-10X=15
X=15/-10
X=-1.5
PROOF
(-8*-1.5)-(2*-1.5)=15
12+3=15
15=15