The like terms are 23y & 2y and 7x & x because they have the same variables
Answer:
To get system B, the SECOND equation in system A was replaced by the sum of that equation and the FIRST equation multiplied by FOUR. The solution to system B IS de same as the solution to system A
Step-by-step explanation:
x-y=3 equation 1
-2x+4y=-2 equation 2
so, multiplying by four the equation 1 we have
4x-4y=12 equation 3
later sum equation 3 and equation 2 we have
2x=10
Answer: 
Step-by-step explanation:
Side a= 110ft
Side b= ?
Height= 75ft
Area= 
Solve for b. Let's begin by multiplying by 2 to get rid of the denominator.
Divide by h
Subtract a
Now plug in your values.
Answer:
u = 7
Step-by-step explanation:
-21 + 7u = 28
add 28 to both sides
7u = 49
divide by 7
u = 7
Answer: 2
Step-by-step explanation: C= pi * d so d= C/pi
