问题
解答题
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答案
(1)9x-3.6=5x,
9x-3.6+3.6=5x+3.6,
9x=5x+3.6,
9x-5x=5x+3.6-5x,
4x=3.6,
4x÷4=3.6÷4,
x=0.9;
(2)7x+(9-3x)=17.8,
4x+9=17.8,
4x+9-9=17.8-9,
4x=8.8,
4x÷4=8.8÷4,
x=2.2.
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(1)9x-3.6=5x,
9x-3.6+3.6=5x+3.6,
9x=5x+3.6,
9x-5x=5x+3.6-5x,
4x=3.6,
4x÷4=3.6÷4,
x=0.9;
(2)7x+(9-3x)=17.8,
4x+9=17.8,
4x+9-9=17.8-9,
4x=8.8,
4x÷4=8.8÷4,
x=2.2.