What is the answer to 2a plus 7b equals -1 3a - 7b equals -5?

Answer 1

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.

Answer 2

2a + 7b = -1

3a - 7b = -5

The system of equations can be solved by elimination:

2a + 3a = -6

5a = -6

a = -6/5

substitute the value of a in any of the two original equations to find the value of b:

2(-6/5) + 7b = -1

-12/5 + 1 = -7b

-7/5 = -7b

b= 1/5