9(x+6)=72, 9x+54=72, x = (72-54)/9 = 2
9(x+6)=72, x+6=72/9=8, x=2
23(x-12)=552, x-12=552/23=24, x=24+12=36
15(2x+11)=285, 2x+11=285/15=19, 2x=19-11=8, x=4
7(123-4x)=749, 123-4x=749/7=107, 123-107=4x, x=16/4=4
и так далее все остальные
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4)
x:8+7=9
x=(9-7)/8 = 2/8=1/4
5)
48:(x+3)=6
x+3 = 48/6 = 8, x=5
6)
48:x+3=6
48:x=6-3=3, 48/3=x, x=16