how to do substitution method and elimination method
Answers
Step-by-step explanation:
Express the word problem as a system of equations. ...
Solve for one of the variables. ...
Substitute the solved variable into the other equation. ...
Solve for the unknown variable.
The method of substitution involves three steps:
Solve one equation for one of the variables.
Substitute (plug-in) this expression into the other equation and solve.
Resubstitute the value into the original equation to find the corresponding variable.
The Elimination Method
Step 1: Multiply each equation by a suitable number so that the two equations have the same leading coefficient. ...
Step 2: Subtract the second equation from the first.
Step 3: Solve this new equation for y.
Step 4: Substitute y = 2 into either Equation 1 or Equation 2 above and solve for x.