3a + 4b - 5 - 1a + 7b + 3 - 1b 2a + 10b - 5 + 3 2a + 10b - 2
36 -20 = 16
4b - 3
a + b = 21 so a = 21 - b; 3a = 4b so 3(21 - b) = 4b ie 63 - 3b = 4b so 7b = 63 making b = 9 and a = 12
p=b+3a+c p-3a-c=b+3a-3a+c-c p-3a-c=b b=p-3a-c
6a²b - 12ab²
4b-b
5a + 4b - 3a =(5a - 3a) + 4b =2a + 4b =2 (a + 2b)
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 Can't do better than that with the information available.
Ans. 2a-5b
The given expression can be simplified to: 3b-a
It is simply as stated in the question. Without information about a or b, the expression cannot be simplified nor evaluated.
36 -20 = 16
3a + 4b - 5 - 1a + 7b + 3 - 1b 2a + 10b - 5 + 3 2a + 10b - 2
15
To simplify the expression 3a x 4b, you multiply the coefficients (numbers) together, which gives you 3 x 4 = 12. Then, you multiply the variables together, which gives you a x b = ab. Therefore, the simplified expression is 12ab.
This expression can be factored. ab + 3a + b2 + 3b = a(b + 3) + b(b + 3) = (a + b)(b + 3)