+64 How does 1 do this?
Use substitution to solve each system of equations.
1.) y=x+5
3x+y=25
Solve the following system:
{y = x+5
3 x+y = 25
Substitute y = x+5 into the second equation:
{y = x+5
4 x+5 = 25
In the second equation, look to solve for x:
{y = x+5
4 x+5 = 25
Subtract 5 from both sides:
{y = x+5
4 x = 20
Divide both sides by 4:
{y = x+5
x = 5
Substitute x = 5 into the first equation:
{y = 10
x = 5
Collect results in alphabetical order:
Answer: | x = 5 y = 10
