Answer:60
Step-by-step explanation: x=10
-7+9=2*10=20
-10*10=100
180-100-20=60
The answer is gonna be D if you're using plato<span />
It has two roots
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The equations are:
x + y = 200
x = y - 40; substituting x from this equation to the first:
y - 40 + y = 200
2y = 240
y = 120
Corresponding value of x:
x = 120 - 40
x = 80
The solution to this system is (80, 120)
Answer:
27
Step-by-step explanation:
We have the equation n over 9 = 3 and are asked to find the solution :
When we have a question like this, we need to isolate n by itself to get the answer.
Multiply 9 to both sides :
n = 27
