求未知数X1-34X=4738=120X2X+3×7=531415-14X-16X=13.-数学
题文
求未知数X 1-
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答案
(1)1-
1-
x=
(2)
3x=120×8, 3x÷3=960÷3, x=320; (3)2x+3×7=53, 2x+21=53, 2x+21-21=53-21, 2x÷2=32÷2, x=16; (4)
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题文
求未知数X 1-
|
答案
(1)1-
1-
x=
(2)
3x=120×8, 3x÷3=960÷3, x=320; (3)2x+3×7=53, 2x+21=53, 2x+21-21=53-21, 2x÷2=32÷2, x=16; (4)
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