Question 1060442
Not sure how to type them in but the bracket is suppose to  connect both numbers in one bracket!      

Solve the system with the addition method:          
{12x+18y= 21
{4x+6y= 7


Enter your answers as integers or as reduced fraction(s) in the form A/B. If there is no solution, type "DNE" in each blank. If there are an infinite number of solutions, specify their form in the blanks in terms of x (eg. (x, 2x-3))
<pre>Factor out a 3 in eq (i): 12x + 18y = 21, to get: 4x + 6y = 7 ------- eq (i).
This is IDENTICAL to eq (ii) so: {{{highlight_green(matrix(1,3, INFINITELY, MANY, SOLUTIONS))}}}
Let no-one tell you otherwise!!