The first step is to isolate one of the variables from one of the equations. We can pick either variable and either equation. The easiest to pick on is the 'x' from the first equation as the coefficient here is 1.
Isolate x in the first equation. Subtract 3y from both sides x+3y = 8 x+3y-3y = 8-3y x = 8-3y So we can see that x is the same as 8-3y
Now move onto the second equation 3x - 5y = -18 3( x ) - 5y = -18 ... rewrite x so it has parenthesis around it 3( 8-3y) - 5y = -18 ... replace x with 8-3y; solve for y 24-9y - 5y = -18 24-14y = -18 24-14y-24 = -18-24 -14y = -42 -14y/(-14) = -42/(-14) y = 3
If y = 3, then x is... x = 8-3y x = 8-3*3 x = 8-9 x = -1
The x and y values are x = -1 and y = 3 Together they pair up to form the ordered pair (x,y) = (-1,3)
The solution is (-1,3) If you graph the two original lines, then they cross at (-1,3)
It’s 52 because there are two sides with 64 degrees (the bottom two sides) and you add those to sides together and subtract your combine angle of the bottom 2 sides by 180 degrees which is the degree of all triangles combine and get 52
