1.-5x=30 2.4\1x=2\1 3.3x+5=0 4.10-x+4x 5.6x-1=11 6.8y-3=5y+3 7.-7x+4=2x-4 8.x-2=3\1x+3\49.2\1x-3=5x+4\1 10.0.2x+1.8=3-1.8x
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![1.-5x=30 2.4\1x=2\1 3.3x+5=0 4.10-x+4x 5.6x-1=11 6.8y-3=5y+3 7.-7x+4=2x-4 8.x-2=3\1x+3\49.2\1x-3=5x+4\1 10.0.2x+1.8=3-1.8x](/uploads/image/z/3764168-8-8.jpg?t=1.-5x%3D30+2.4%5C1x%3D2%5C1+3.3x%2B5%3D0+4.10-x%2B4x+5.6x-1%3D11+6.8y-3%3D5y%2B3+7.-7x%2B4%3D2x-4+8.x-2%3D3%5C1x%2B3%5C49.2%5C1x-3%3D5x%2B4%5C1+10.0.2x%2B1.8%3D3-1.8x)
1.-5x=30 2.4\1x=2\1 3.3x+5=0 4.10-x+4x 5.6x-1=11 6.8y-3=5y+3 7.-7x+4=2x-4 8.x-2=3\1x+3\49.2\1x-3=5x+4\1 10.0.2x+1.8=3-1.8x
1.-5x=30 2.4\1x=2\1 3.3x+5=0 4.10-x+4x 5.6x-1=11 6.8y-3=5y+3 7.-7x+4=2x-4 8.x-2=3\1x+3\4
9.2\1x-3=5x+4\1 10.0.2x+1.8=3-1.8x
1.-5x=30 2.4\1x=2\1 3.3x+5=0 4.10-x+4x 5.6x-1=11 6.8y-3=5y+3 7.-7x+4=2x-4 8.x-2=3\1x+3\49.2\1x-3=5x+4\1 10.0.2x+1.8=3-1.8x
1.x=30/(-5)=-6
2.x=4/2=2
3.3x=-5
x=-5/3
4.9-x+22.4x=11
21.4x=2
x=2/21.4 x=5/21
5.6x=11+1=12
x=12/6=2
6.8y-5y=3+3
3y=6 y=2
7.-7x-2x=-4-4
-9x=-8
x=8/9
8.(同乘4x)4x^2-8x=12+3x
4x^2-11x-12=o x=[-b±√(b^2-4ac)]/(2a)
9.(同乘x)2-3x=5x^2+4X
5x^2-7x-2=0 x=[-b±√(b^2-4ac)]/(2a)
10.(同乘10)2x+18=30-18x
20x=12 x=1/6
(12-2x)+(3.2x-4.8)=24 (2x+5)‐(20‐3x)=175 25-2(30‐20x)=16 0.5x+6.5x-4x=4.8-1.2 3x=3.6 ---> x=1.2 12-2x+3.2x-
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