Solving by Combining Like Terms
Substitute and Solve: 2x+x-4 when x=4
2(4)+4-4
8+0
8
Substitute and Solve. 3x²-y when x=-2, y=-3
3(-2)²-(-3)
3(4)+3
12+3
15
Substitute and Solve. 2xy-w when w=-5, x=4, y=1, z=12
2(4)(1)-(-5)
8+5
13
Substitute and Solve. 4x - x² when x = -3
4(-3)-(-3)²
-12-9
-21
Substitute and Solve. 3(x-y)²-z when x=3, y=4, z=-2
3((3)-(4))²-(-2)
3(-1)²+2
3+2
5