0
Clearly, there are some signs missing.
So let's try the four possibilities for the second terms:
1. + and +
3a + 4b = 7a + 4b
Subtract 4b from each side: 3a = 7a
Subtract 3a from each side: 0 = 4a
Answer : a = 0, b indeterminate (ie can have any vaue).
2. + and -
3a + 4b = 7a - 4b
Subtract 4b from each side: 3a = 7a - 8b
Subtract 7a from each side: -4a = -8b or 4a = 8b
Answer: a = 2b
3. - and -
3a - 4b = 7a - 4b
Add 4b to each side: 3a = 7a
Subtract 3a from each side: 0 = 4a
Answer : a = 0, b indeterminate (ie can have any vaue).
4. - and +
3a - 4b = 7a + 4b
Add 4b to each side: 3a = 7a + 8b
Subtract 7a from each side: -4a = 8b or 4a = -8b
Answer: a = -2b
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What is -7a plus 3a?
-7a + 3a = -4a
Simplify a plus 3a-2 plus 3a?
a + 3a - 2 + 3a. Add the a + 3a + 3a = 7a. You can't combine the -2 & 7a so the solution is: 7a - 2.
7a-17 equals 4a plus 1?
7a-17 = 4a+1 7a-4a = 1+17 3a = 18 a = 6
What is 3a plus 5b plus 7a?
3a+5b+7a=
What is 4a plus 3a?
4a + 3a = (4 + 3)a = 7a
