42x+30=60(x-1)怎么算,

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42x+30=60(x-1)怎么算,
42x+30=60(x-1)怎么算,

42x+30=60(x-1)怎么算,
42x+30=60x-60 移项 30+60=60x-42x 90=18x 所以x=5 分给我吧···

42x+30=60X-60
90=18x
x=5

42x+30=60(x-1)
42x+30=60x-60
42x-60x=-60-30
-18x=-90
x=5

42x+30=60(x-1) 42x+30=60x-60 60x-42x=30+60 18x=90 x=5

42x+30=60(x-1)
42x+30=60x-60
60x-42x=30+60
18x=90
x=5

42x+30=60x-60
42x+30-42x=60x-60-42x
30=18x-60
30+60=18x-60+60
90=18x
90除18=18x除18
5=x

42x+30=60x-60
42x-60x=-60-30
(42-60)x=-90
-18x=-90
x=-90/-18
x=5

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