Answer:
0
Step-by-step explanation:
When put in between these lines || a negative number becomes positive and a positive number stays the same.
Answer:
x=71
Step-by-step explanation:
180-38= 142
142/2= 71
it looks like x and the blank space are the same size
Answer:
n = 10
Step-by-step explanation:
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5x + y = 15
y = -5x + 15
Substituting y= -5x+15 from first equation into second equation:
3x + 2y = 16
3x + 2·(-5x + 15) = 16
3x - 10x + 30 = 16
-7x + 30 = 16
7x = 30 - 16 = 14
x = 2
Substituting x=2 into the first equation:
5x + y = 15
5(2) + y = 15
10 + y = 15
y = 15 - 10
y = 5
So your final answers are x=2 and y=5.
