Answer:6
Step-by-step explanation: pls mark brainliest
Answer:
The correct answer is M = 1 and N = -4
Step-by-step explanation:
In order to solve this system, use the elimination method. To do this, simply add the two equations together.
2m - 3n = 14
m + 3n = -11
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3m = 3
Now solve for m.
3m = 3
m = 1
Now that we have the value of m, we can use either equation to find the value of n.
2m - 3n = 14
2(1) - 3n = 14
2 - 3n = 14
-3n = 12
n = -4
Answer: Mary is 25 David is 20
Step-by-step explanation:
Answer:
x = -20
Step-by-step explanation:
Solve for x:
50 = 5 x - 8 x - 7 - 3
Grouping like terms, 5 x - 8 x - 7 - 3 = (5 x - 8 x) + (-3 - 7):
50 = (5 x - 8 x) + (-3 - 7)
5 x - 8 x = -3 x:
50 = -3 x + (-3 - 7)
-3 - 7 = -10:
50 = -10 - 3 x
50 = -3 x - 10 is equivalent to -3 x - 10 = 50:
-3 x - 10 = 50
Add 10 to both sides:
(10 - 10) - 3 x = 10 + 50
10 - 10 = 0:
-3 x = 50 + 10
50 + 10 = 60:
-3 x = 60
Divide both sides of -3 x = 60 by -3:
(-3 x)/(-3) = 60/(-3)
(-3)/(-3) = 1:
x = 60/(-3)
The gcd of 60 and -3 is 3, so 60/(-3) = (3×20)/(3 (-1)) = 3/3×20/(-1) = 20/(-1):
x = 20/(-1)
Multiply numerator and denominator of 20/(-1) by -1:
Answer: x = -20
