exam Maths Puzzle Numerical Ability

I need help using the echelon method to solve each of two equations in two unknowns.

2x + 7y = -8
-2x + 3y = -12

Read Solution (Total 0)

exam Other Question

determine whether the lines through the paris of points are parallel, perpendicular, of neither

3x-12y=11
64x+12y=-18

A picture measuring 40cm by 60cm is surrounded by a frame of uniform width. If the area of the frame equals the area of the picture,then what is the width of the frame ?
Please help me :)