Question

If the following ordered pairs are equal find x and y
a) (3x+4y, 10) and (20, 40-3y)​

Answer 1

Step one: 3x+4y=20; 10=40-3y

Step two: 3y=40-10, so y=(40-10)/3=10

Step three: 3x+4*10=20

Step four: 3x=20-40=-20, so x=-20/3=-6.66666...~ -6.67