解方程:30+10(x-6)=30 6x-7=5x+4 4(4x-11)=3(22-2x) 7(2x-6)=84 5(x-8)=3x 4.2x-9=2.5x+2.9还有一题:9(2x-3)-2=5(2x-1)注意,要正确,
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![解方程:30+10(x-6)=30 6x-7=5x+4 4(4x-11)=3(22-2x) 7(2x-6)=84 5(x-8)=3x 4.2x-9=2.5x+2.9还有一题:9(2x-3)-2=5(2x-1)注意,要正确,](/uploads/image/z/94197-21-7.jpg?t=%E8%A7%A3%E6%96%B9%E7%A8%8B%EF%BC%9A30%2B10%28x-6%29%3D30+6x-7%3D5x%2B4+4%284x-11%29%3D3%2822-2x%29+7%282x-6%29%3D84+5%28x-8%29%3D3x+4.2x-9%3D2.5x%2B2.9%E8%BF%98%E6%9C%89%E4%B8%80%E9%A2%98%3A9%282x-3%29-2%3D5%282x-1%29%E6%B3%A8%E6%84%8F%2C%E8%A6%81%E6%AD%A3%E7%A1%AE%2C)
解方程:30+10(x-6)=30 6x-7=5x+4 4(4x-11)=3(22-2x) 7(2x-6)=84 5(x-8)=3x 4.2x-9=2.5x+2.9还有一题:9(2x-3)-2=5(2x-1)注意,要正确,
解方程:30+10(x-6)=30 6x-7=5x+4 4(4x-11)=3(22-2x) 7(2x-6)=84 5(x-8)=3x 4.2x-9=2.5x+2.9
还有一题:
9(2x-3)-2=5(2x-1)
注意,要正确,
解方程:30+10(x-6)=30 6x-7=5x+4 4(4x-11)=3(22-2x) 7(2x-6)=84 5(x-8)=3x 4.2x-9=2.5x+2.9还有一题:9(2x-3)-2=5(2x-1)注意,要正确,
30+10(x-6)=30:10(x-6)=0,10x-60=0,x=6
6x-7=5x+4:6x-5x=4+7,x=11
4(4x-11)=3(22-2x):16x-44=66-6x,22x=110,x=5
7(2x-6)=84:12x-42=84,14x=126,x=9
5(x-8)=3x:5x-40=3x,2x=40,x=20
4.2x-9=2.5x+2.9:4.2x-2.5x=2.9+9,1.7x=11.9,x=7