x+2y=23 6x+3y=98
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A) x+2y=23 B) 6x+3y=98 Multiply equation A by -6 then add to B A) -6x -12y = -138 B) 6x+3y=98 -9y = -40 y = -40 / -9 y = 4.4444444444 Think you can figure out x now ?
There are two ways for solving linear equations in two unknowns like this, the first method is substitution, and the second method is elimination which is demonstrated above.
Since Wolf has already demonstrated the substitution method, please now try the method of elimination by addition/subtraction. Write out 6x + 3y = 98, as is. Now take the other equation and multiply every term in it by -6. Combine your result with 6x + 3y = 98. (Here, "combine" involves subtraction.)
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