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8b=58-26
8b=32
b=
b=4
e)3(2+x)=9
2+x=
2+x=3
x=3-2
x=1
f)(5-x):3=15
5-x=15*3
5-x=45
x=5-45
x=-40
g)42:(y+4)=6
y+4=42:6
y+4=7
y=7-4
y=3