Exercise 12
simplify 3r-4+7 - 2x + 4x
you can rearrange this to have the like terms tog
3r-2r + 4x + 7-4
o have the like terms together, i. e.
3x -4+7 - 2x + 4x = 5x + 3
simplify 2x + 4y -x + 5y
2x + 4y-x+ 5y = 2x -x + 4y + 5y = x + oy
+
1
simplify:
1 2x+4+3 + 5x 5 6x + 5y + 2x - 3y
2 2x - 4+ 3x + 9
6 6x+ 5y + 2x
3 5x- 2+3 x
7 6x+6y - 2x
4 4a + 5c + 6a 8 6x + 5y - 2x + 3y
13 6x + 5y + 2x + 3y + 2x
14 6x + 5y - 2x - 3y + 7x +y
15 30x + 2-15x - 6+4
16 2z + 3x + 4y +62 +x-3y
4x + 1 + 3x + 2 + x
6x + 9 + 2x - 1
11 7x-3+9 - 4x
12 9x + 3y + 10x
17 4x + 3y - 4 + 6x - 2y +7-x
18 7x +3-9-9x + 2x + 6 +11
og
like terms here: xs, y
there are three sets of
like terms here: x's, y's
and z's.