问题
解答题
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答案
①18+15x=21,
18+15x-18=21-18,
15x=3,
x=0.2;
②(x+1.2)×5=36, (x+1.2)×5÷5=36÷5, x+1.2=7.2, x+1.2-1.2=7.2-1.2, x=6; | ||
③24x-8x=28.8, 16x=28.8, 16x÷16=28.8÷16, x=1.8; ④8x÷0.6=2.4, 8x÷0.6×0.6=2.4×0.6, 8x=1.44, 8x÷8=1.44÷8, x=0.18; |
4x-3.6=6.8,
4x-3.6+3.6=6.8+3.6,
4x=10.4,
4x÷4=10.4÷4,
x=2.6;
⑥15x+3.8×12=87.6,
15x+45.6=87.6,
15x+45.6-45.6=87.6-45.6,
15x=42,
15x÷15=42÷15,
x=2.8.