问题
解答题
解方程: (1)15+x=36 (2)4x-1.2×6=8.8 (3)2x+
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答案
(1)15+x=36,
15+x-15=36-15,
x=21;
(2)4x-1.2×6=8.8,
4x-7.2+7.2=8.8+7.2,
4x÷4=16÷4,
x=4;
(3)2x+
x=27,1 4
2.25x=27,
2.25x÷2.25=27÷2.25,
x=12.
解方程: (1)15+x=36 (2)4x-1.2×6=8.8 (3)2x+
|
(1)15+x=36,
15+x-15=36-15,
x=21;
(2)4x-1.2×6=8.8,
4x-7.2+7.2=8.8+7.2,
4x÷4=16÷4,
x=4;
(3)2x+
x=27,1 4
2.25x=27,
2.25x÷2.25=27÷2.25,
x=12.