7x-23+11x+23=180
4x+0=180
4x/4=180/4
X=45
Answer: x=45
Answer:
Step-by-step explanation:
substitute x = - y - 2 in 0.5x + y = 1
0.5(- y - 2) + y = 1
-0.5y-1+y=1
0.5y=2
y=4
x=- y - 2
x=-4-2
x=-6
Answer:
n + 45
Step-by-step explanation:
The question is asking to write an algebraic expression for the sum of a number and 45. We know we are adding a number to 45. So we use addition. But, we don't which number we are adding to 45. So we just use a variable. I used "n", but use whatever letter you want ( x, y, z, etc). I recomend using the same variable that your intrcuctor uses.
Hope this helps.
