Answer:
Y = 3
Step-by-step explanation:
First add 3 to both sides to get rid of the (-3) on the left.
y - 3 + 3 = 2( x + 1 ) + 3 which is y = 2( x + 1 ) + 3
Now multiply the number associated with the parentheses:
y = 2x +2 + 3 then you can add the two numbers without variables.
y = 2x + 5
So now if X = -1 and you put it into that equation, you get:
y = 2(-1) + 5 which is y = -2 + 5
and finally y = 3
You could also do this another way. Plug the value of x into the original equal on the right side so you have this:
y - 3 = 2( -1 + 1 ) you see that -1 + 1 is equal to 0 so 2 times 0 is 0
you are left with y - 3 = 0
if you add 3 to both sides you get y - 3 + 3 = 0 + 3 which turns into
y = 3
