Make an equation. 2x - 3 + 5x + 2 = 90. Combine like terms. 7x -1 = 90. Add 1. 7x = 91. Divide and get x = 13.
Now plug in x to the original equations and JKL is 23. MNP is 67. To check, add the numbers together and if they equal 90, it is correct. ( it is right by the way)
Remember: comPlementary has one p, so the two add up to 90.
suPPlementary has two p's, so the two add up to 180.
