2x - 2y = -12
4x - 7y = -15
Multiply the first equation by -2 to make the 2x the opposite of 4x:
2x - 2y = -12 x -2 = -4x + 4y = 24
Now add this to the second equation:
-4x + 4y = 24 + 4x - 7y = -15:
-3y = 9
Divide both sides by -3
y = 9 / -3
y = -3
Now you have Y, replace y in one of the equations and solve for x:
2x - 2(-3) = -12
2x +6 = -12
Subtract 6 from both sides:
2x = -18
Divide both sides by 2:
x = -18 /2
X = -9
Check:
2(-9) - 2(-3) = -12
-18 + 6 = -12 TRUE
4(-9) - 7(-3) = -15
-36 +21 = -15 TRUE
X = -9, y = -3
(-9,-3)
Answer:
−
3
=
−
14
Step-by-step explanation:
Hope this helps !
I believe this is -9, I did -54 divided by 6.
Answer:
Concept: Ordinary Mathematics
- Just a general tip: Zoom away further from the camera to capture the question clearer.
- Calculate the Total: 31 students
- A= 4/31= 13%
- (A+B)/31 = 14/31 = 45%
- Can't see clearly what it says
Answer:
(-8) and 3.5 and (3.5)
Step-by-step explanation:
The opposite of (8) is (-8). The opposite of -3.5 is 3.5. The opposite of (-3.5) is (3.5).
