Ineed to solve this equation: x= r-h/ y for h and then for r

Step-by-step explanation:

Solve the equation for h

We need to get 'h' alone

multiply y on both sides

Now add h on both sides

Subtract xy from both sides

Now solve the equation for 'r'

multiply y on both sides

Now add h on both sides

x = 10.1

step-by-step explanation:

all of the angles of a tirangle add up to 180º

180 - 65 = 115 (since we already know the value of one angle)

(2x + 7) + (8x + 7) = 115

(combins like terms) 10x + 14 = 115

(isolate the variable subtract 14 from both sides): 10x = 101

(find the variable divide both sides by 10): x = 101/10

x = 10.1