How do you solve: 2x+3y=7 -10x-3y=25 Its a problem with two unknowns I have to solve for x and y
S SILVER New member Joined Jan 27, 2011 Messages 18 Feb 23, 2011 #1 How do you solve: 2x+3y=7 -10x-3y=25 Its a problem with two unknowns I have to solve for x and y
M masters Full Member Joined Mar 30, 2007 Messages 378 Feb 23, 2011 #2 SILVER said: How do you solve: 2x+3y=7 -10x-3y=25 Its a problem with two unknowns I have to solve for x and y Click to expand... Hi Yo SILVER, Haven't we done this type of problem before? Just add the two equations together. Now, you have an equation in one variable. Solve it. Use the answer to substitute back into either equation to find the other variable.
SILVER said: How do you solve: 2x+3y=7 -10x-3y=25 Its a problem with two unknowns I have to solve for x and y Click to expand... Hi Yo SILVER, Haven't we done this type of problem before? Just add the two equations together. Now, you have an equation in one variable. Solve it. Use the answer to substitute back into either equation to find the other variable.
