解方程. 4x+5.2=5.2
解方程.4x+5.2=5.24.8x+2.6x=3.72(x+8)=2258.4-3x=31.4y÷4+3.2=13.2x-0.36x=16....
解方程. 4x+5.2=5.2 4.8x+2.6x=3.7 2(x+8)=22 58.4-3x=31.4 y÷4+3.2=13.2 x-0.36x=16.
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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. |
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