Solve by substition x-y=-1 3x+2y=22

x=4 and y= 5

Step-by-step explanation: 1 Solve for xx in x-y=-1x−y=−1.

x=y-1

x=y−1

2 Substitute x=y-1x=y−1 into 3x+2y=223x+2y=22.

5y-3=22

5y−3=22

3 Solve for yy in 5y-3=225y−3=22.

y=5

y=5

4 Substitute y=5y=5 into x=y-1x=y−1.

x=4

x=4

5 Therefore,

\begin{aligned}&x=4\\&y=5\end{aligned}

​

x=4

y=5

​

900 degrees

step-by-step explanation:

< xcy ≅ < xby

step-by-step explanation:

in δcax and δbax,

so, δcax ≅ δbax (side-angle-side or sas)

since δcax ≅ δbax, we can conclude < acx ≅ < abx

in δacy and δaby,

so, δacy ≅ δaby (side-angle-side or sas)

since δacy ≅ δaby, we can conclude < acy ≅ < aby

now,

< acy ≅ < aby

=> < acx + < xcy ≅ < abx + < xby

=> < acx + < xcy ≅ < acx + < xby   (since < acx ≅ < abx already proved above)

subtracting < acx from both sides, we get

< acx + < xcy -< acx ≅ < acx + < xby -< acx

cancelling out < acx and -< acx from both sides, we get

< xcy ≅ < xby (proved)