Solve Each System by Using Either the Substitution or the Elimination-By-Addition

question 263

Multiple Choice

Solve each system by using either the substitution or the elimination-by-addition method, whichever seems more appropriate. $$\left( \begin{array} { c } \frac { 3 x } { 4 } - \frac { 2 y } { 3 } = 84 \\\frac { 7 x } { 6 } + \frac { y } { 5 } = 75\end{array} \right)$$

• A) ( 72, \(-\) 45)
• B) ( 72, 45)
• C) ( \(-\) 72, \(-\) 45)
• D) no solutions
• E) infinitely many solutions

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