7a + 10 = 2a 7a = 2a -10 5a = -10 a = -2
2a+5a=3 7a=3 a=3/7 or .4286
Collect like terms: 9a -7a = 9 - 15, ie 2a = -6, so a = -3
7a-3
3m+5a
-7a+2a+9 is also -5a+9. -5a+9=24. -5a=15. a=-3.
7a+10=2a 7a+10-2a=0 5a+10=0 5a=-10 a=-2
7a + 10 = 2a 7a = 2a -10 5a = -10 a = -2
7a + 4 = 5a + 7 7a = 5a + 3 2a = 3 a = 3/2
2a+5a=3 7a=3 a=3/7 or .4286
7a
Collect like terms: 9a -7a = 9 - 15, ie 2a = -6, so a = -3
Add them together: 2a+5a = 7a
7a-3
3m+5a
9a + 1
2a + 10 + 5a - 2 = (2a + 5a) + (10 - 2) = 7a + 8