2a+2a-7b+7b
=4a
11a+7b-(3b-2a)
-57
add like terms: 3a -2a -5b + 6b +3b - 7b = a -3b
6a + (7b - 4a - 8b) = (6a - 4a) + (7b - 8b) = 2a - b
To solve this system of equations, you can use the method of elimination. First, multiply the first equation by 3 and the second equation by 2 to make the coefficients of 'a' the same. This gives you 6a + 21b = -3 and 6a - 14b = -10. Subtract the second equation from the first to eliminate 'a', resulting in 35b = 7. Dividing by 35 gives you b = 0.2. Substitute b back into one of the original equations to solve for 'a', yielding a = -2.
1a+3b 2a+4b=3a +7b
3a + 4b - 5 - 1a + 7b + 3 - 1b 2a + 10b - 5 + 3 2a + 10b - 2
To solve the expression (2a + 6b - 2a - b), you first combine like terms. The (2a) and (-2a) cancel each other out, leaving you with (6b - b). Simplifying (6b - b) gives you (5b). Therefore, the simplified result is (5b).
-2a + 5 = 1 -2a = -5 + 1 -2a = -4 a = -4/-2 a = 2
3a x 2a =24
(2a + 1)(4a2 - 2a + 1)
2a - 7 = -9 2a - 7 + 7 = -9 + 7 2a = -9 +7 2a = -2 2a/2 = -2/2 a = -2/2 a= -1