Question

[haanhtuan]

B1)Tim X biet

 A)3(X-4)-(8-X)=12

 B)4(X-5)-(X=7)=-19

 C)7(X-3)-5(3-X)=11X-5

B2)a)Chung to rang cac phan so tren bang nhau​

A)25/53:2525/5353:252525/535353

B)37/41:3737/4141:373737/414141

b)Tim phan so bang phan so 11/33 va biet rang hieu cua mau va tu cua no bang 6

Answer 1

[haanhtuan]

GIUP MINH VOI

Answer 2

[Despacito]

a) \(3\left(x-4\right)-\left(8-x\right)=12\)

\(3x-12-8+x=12\)

\(4x=12+12+8\)

\(4x=32\)

\(x=8\)

b) \(4\left(x-5\right)-\left(x-7\right)=-19\)

\(4x-20-x+7=-19\)

\(3x=-19+20-7\)

\(3x=-6\)

\(x=-2\)

c) \(7\left(x-3\right)-5\left(3-x\right)=11x-5\)

\(7\left(x-3\right)+5\left(x-3\right)=11x-5\)

\(\left(x-3\right).12=11x-5\)

\(12x-36-11x+5=0\)

\(x-31=0\)

\(x=31\)