题目内容
解方程.
(1)8X-5X=27 (2)4x-0.5x=0.7 (3)4X+1.2×5=24.4.
(1)8X-5X=27 (2)4x-0.5x=0.7 (3)4X+1.2×5=24.4.
(1)8X-5X=27,
3x=27,
3x÷3=27÷3,
x=9;
(2)4x-0.5x=0.7,
3.5x=0.7,
3.5x÷3.5=0.7÷3.5,
x=0.2;
(3)4X+1.2×5=24.4,
4x+6-6=24.4-6,
4x=18.4,
4x÷4=18.4÷4,
x=4.6.
3x=27,
3x÷3=27÷3,
x=9;
(2)4x-0.5x=0.7,
3.5x=0.7,
3.5x÷3.5=0.7÷3.5,
x=0.2;
(3)4X+1.2×5=24.4,
4x+6-6=24.4-6,
4x=18.4,
4x÷4=18.4÷4,
x=4.6.
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