解方程:(1)4x=3x+5 (2)1/2x-7=3 (3)4x-7=6x+9 (4)3(x-5)=-21
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解方程:(1)4x=3x+5 (2)1/2x-7=3 (3)4x-7=6x+9 (4)3(x-5)=-21
(5)1+2x/2=2-1+x/4 (6)2x-1/0.7=x/0.3-1/7 (7)5-6(5/6-x-1/3)=2(x-3/4)
(5)1+2x/2=2-1+x/4 (6)2x-1/0.7=x/0.3-1/7 (7)5-6(5/6-x-1/3)=2(x-3/4)
(1)4x=3x+5 4x-3x=5 x=5
(2)1/2x-7=3 1/2x=10 x=20
(3)4x-7=6x+9 -7-9=6x-4x x=-8
(4)3(x-5)=-21 x-5=-7 x=-2
(5)1+2x/2=2-1+x/4 1+x=1+x/4 x=0
(6)2x-1/0.7=x/0.3-1/7 -4/3x=9/7 x=-27/28
(7)5-6(5/6-x-1/3)=2(x-3/4)
5-(5-6x-2)=2x-3/2
2+6x=2x-3/2
4x=-7/2
x=-7/8
(2)1/2x-7=3 1/2x=10 x=20
(3)4x-7=6x+9 -7-9=6x-4x x=-8
(4)3(x-5)=-21 x-5=-7 x=-2
(5)1+2x/2=2-1+x/4 1+x=1+x/4 x=0
(6)2x-1/0.7=x/0.3-1/7 -4/3x=9/7 x=-27/28
(7)5-6(5/6-x-1/3)=2(x-3/4)
5-(5-6x-2)=2x-3/2
2+6x=2x-3/2
4x=-7/2
x=-7/8
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