SOLUTION: solve the system by substitution. 1. x+y=-7 x=y+19 show step by step work please also 2. x^2=5 number 2 is not solving by substitution. It just says solve.

Question 408284: solve the system by substitution.
1. x+y=-7
x=y+19
show step by step work please
also 2. x^2=5
number 2 is not solving by substitution. It just says solve.
Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
solve the system by substitution.
x + y =-7
x = y + 19
Use the 2nd equation for substitution in the 1st equation
In the 1st equation replace x with (y+19)
(y+19) + y = -7
2y = -7 - 19
2y = -26
y =
y = -13
Find x using the 2nd equation, replace y with -13
x = -13 + 19
x = +6
check solutions, substitute for x and y in the 1st equation
6 - 13 = -7
:
:
also 2. x^2=5
Find the square root of both sides
x = +/-
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