问题
解答题
解方程.
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答案
根据题意可得:
(1)4x+5.2=5.2,
4x+5.2-5.2=5.2-5.2,
4x=0,
4x÷4=0÷4,
x=0;
(2)4.8x+2.6x=3.7,
7.4x=3.7,
7.4x÷7.4=3.7÷7.4,
x=0.5;
(3)2(x+8)=22,
2(x+8)÷2=22÷2,
x+8=11,
x+8-8=11-8,
x=3;
(4)58.4-3x=31.4,
58.4-3x+3x=31.4+3x,
3x+31.4=58.4,
3x+31.4-31.4=58.4-31.4,
3x=27,
3x÷3=27÷3,
x=9;
(5)y÷4+3.2=13.2,
y÷4+3.2-3.2=13.2-3.2,
y÷4=10,
y÷4×4=10×4,
y=40;
(6)x-0.36x=16,
0.64x=16,
0.64x÷0.64=16÷0.64,
x=25.