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
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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\4
9.2\1x-3=5x+4\1 10.0.2x+1.8=3-1.8x
9.2\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
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
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