Multiply the first by 5 ====> 10x + 15y = 5
multiply the 2nd by 2 ====> 10x + 14y = 6
subtract them to get
y = -1
now sub that back into the 1st to get your x.
solve each of the following systems:
(a) 2x + 3y = 1,5x+7y=3
1 answer