1) 7x-5=86
7x=86+5
7x=91
x=13
2) 250/(x+7)=25
250=25*(x+7)
10=x+7
x=10-7
x=3
3)46-x/12=38
-x/12=38-46
x/12=8
x=12*8
x+96
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Answers & Comments
1) 7x-5=86
7x=86+5
7x=91
x=13
2) 250/(x+7)=25
250=25*(x+7)
10=x+7
x=10-7
x=3
3)46-x/12=38
-x/12=38-46
x/12=8
x=12*8
x+96