
解下列方程.2x+36=168 8x-5x=18 x÷0.6=1.8 4.2=
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(1)2x+36=168,
2x+36-36=168-36,
2x=132,
2x÷2=132÷2,
x=66;
(2)8x-5x=18,
3x=18,
3x÷3=18÷3,
x=6;
(3)x÷0.6=1.8,
x÷0.6×0.6=1.8×0.6,
x=1.08;
(4)4.2=6x-1.8,
6x-1.8=4.2,
6x-1.8+1.8=4.2+1.8,
6x=6,
6x÷6=6÷6,
x=1.
2x+36-36=168-36,
2x=132,
2x÷2=132÷2,
x=66;
(2)8x-5x=18,
3x=18,
3x÷3=18÷3,
x=6;
(3)x÷0.6=1.8,
x÷0.6×0.6=1.8×0.6,
x=1.08;
(4)4.2=6x-1.8,
6x-1.8=4.2,
6x-1.8+1.8=4.2+1.8,
6x=6,
6x÷6=6÷6,
x=1.
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