32-22X=10 (200-X)÷5=30 &n
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32-22X=10 | (200-X)÷5=30 | (18X-2)=270 | 100-20X=20+30X. |
(1)32-22X=10,
32-22X+22X=10+22X,
22X+10-10=32-10,
22X=22,
22X÷22=22÷22,
X=1;
(2)(200-X)÷5=30,
(200-X)÷5×5=30×5,
200-X=150,
200-X+X=150+X,
X+150=200,
X+150-150=200-150,
X=50;
(3)18X-2=270,
18X-2+2=270+2,
18X=272,
18X÷18=272÷18,
X=15
1
9;
(4)100-20X=20+30X,
100-20X+20X=20+30X+20X,
50X+20=100,
50X+20-20=100-20,
50X=80,
50X÷50=80÷50,
X=1.6.
32-22X+22X=10+22X,
22X+10-10=32-10,
22X=22,
22X÷22=22÷22,
X=1;
(2)(200-X)÷5=30,
(200-X)÷5×5=30×5,
200-X=150,
200-X+X=150+X,
X+150=200,
X+150-150=200-150,
X=50;
(3)18X-2=270,
18X-2+2=270+2,
18X=272,
18X÷18=272÷18,
X=15
1
9;
(4)100-20X=20+30X,
100-20X+20X=20+30X+20X,
50X+20=100,
50X+20-20=100-20,
50X=80,
50X÷50=80÷50,
X=1.6.