6x-2x=0.72解方程
解方程.(1)6x-2x=0.72(2)5x+3x=3.2×2(3)2x-13×4=6(4)3(x-6)=27(5)12-9+35x=73(6)9(x-8)=12×3....
解方程. (1)6x-2x=0.72 (2)5x+3x=3.2×2 (3)2x-13×4=6 (4)3(x-6)=27 (5)12-9+35x=73 (6)9(x-8)=12×3.
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(1)6x-2x=0.72,
4x=0.72,
4x÷4=0.72÷4,
x=0.18;
(2)5x+3x=3.2×2,
8x=6.4,
8x÷8=6.4÷8,
x=0.8;
(3)2x-13×4=6,
2x-52+52=6+52,
2x÷2=58÷2,
x=29;
(4)3(x-6)=27,
3(x-6)÷3=27÷3,
x-6+6=9+6,
x=15;
(5)12-9+35x=73,
3+35x-3=73-3,
35x÷35=70÷35,
x=2;
(6)9(x-8)=12×3,
9(x-8)÷9=36÷9,
x-8+8=4+8,
x=12.
4x=0.72,
4x÷4=0.72÷4,
x=0.18;
(2)5x+3x=3.2×2,
8x=6.4,
8x÷8=6.4÷8,
x=0.8;
(3)2x-13×4=6,
2x-52+52=6+52,
2x÷2=58÷2,
x=29;
(4)3(x-6)=27,
3(x-6)÷3=27÷3,
x-6+6=9+6,
x=15;
(5)12-9+35x=73,
3+35x-3=73-3,
35x÷35=70÷35,
x=2;
(6)9(x-8)=12×3,
9(x-8)÷9=36÷9,
x-8+8=4+8,
x=12.
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