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18x-10x=22+2
8x=24
x=24/8
x=3
20-3x
=20-3(3)
=20-9
=11
18x-10x = 22 + 2
8x = 24
x. = 24 : 8
x = 3
maka 20 - 3x = 20 - 3(3) = 11