(5y-1)÷2=7
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(5y-1)÷2=7(5y-1)÷2=7(5y-1)÷2=7(5y-1)÷2=75y-1=145y=15y=35y-1=7*25y-1=145y=14+15y=15y=15/5y=3
(5y-1)÷2=7
(5y-1)÷2=7
(5y-1)÷2=7
(5y-1)÷2=7
5y-1=14
5y=15
y=3
5y-1=7*2
5y-1=14
5y=14+1
5y=15
y=15/5
y=3
2(y-4)(3y+2)-5(-3y+7)(y+1),其中y=-1
2y-1=5y+7
2y+1=5y+7
17(2-3y)-5(12-y)=8(1-7y)求y的值
2//5(y-3)=1/3y-3/5(y-7)
2/5(y-3)=1/3y-3/5(y-7)
若(5x+y)/(7x+10y)=1/2则x/y=
y(y-2)²-y(y+3)(y-5) y=1/2 化简求值
y(y-2)²-y(y+3)(y-5) y=1/2 化简求值
y(y-2)²-y(y+3)(y-5) y=1/2 化简求值
若 4y^2-2y+5=7 则 2y^2-y+1=?
4(2y+5)-3y=7(y-5)+4(2y+1)
{6(x-y)-7(x+y)=21 {2(x-y)-5(x+y)=-1
4(5—2y)+7(y+1)=3(4y-1)+17求y
4*(5—2y)+7(y+1)=3(4y-1)+17求y
代数式4y² - 2y + 5 = 7,那么代数式2y² - y + 1
方程5y(2y-3)=(y+2)(y-2)-1
(y+1)分之(2y+3)=(3y+4)分之(6y+7)