1: Solve for either x or y in one of the equations. So x + y = -1 is y = -x -1
2: substitute the new equation in the opposite equation. So x - (-x - 1) = 7
3: distribute the negative. X + x + 1 = 7
4: combine like terms. 2x + 1 = 7
5: solve for x. Subtract 1 on both sides. 2x = 6
6: divide by 2 to get x by itself. X = 3
7: plug the new value of x into one of the ORIGINAL equations. 3 + y = -1
8: solve for y. Subtract 3 on both sides.
Y = -4
9: the solution is written as (x,y) so the solution would be (3, -4)
Answer:
12
Step-by-step explanation: it is 12 because LCM is least common mulitiple. The LCM is the smallest number of all the number that can DIVIDE EVENLY. 6 cannot divide evenly.
Answer:
y = 8x + 72
Step-by-step explanation:
Answer:
109?
Step-by-step explanation:
