Posted by Diana on Thursday, June 7, 2007 at 12:21am.
solve each of the following systems by substitution.
16) 5x -2y = -5
y - 5x = 3
20) 8x -4y = 16
y = 2x - 4
28) 4x -12y = 5
-x + 3y = -1
Step one: Solve on of the equations for one of the variables.
Step two:Substitute the expression for the variable found in step one into the other equation.
Step three:Solve the equation from step two to find the value of one variable.
Use the distributive property
Step four:Substitute the value found in step three in any equation containing both variables to find the value of the other variable.
step five: check the proposed solution in the orginal system.
The equation is equal, so it is correct.
3y=-x or -3y=x
y=5 +60 +60
260/4 - 60=5
65 - 60 = 5
5 = 5
I hope I helped
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