∠1 and ∠2 are complementary angles. ∠1 = x°
∠2 = (3x + 30)°
Using this information, find the value of x.

Remember the formula for finding the missing degree in a right-angle (with two complementary angles)? Use ∠1 + ∠2 = 90°

x = 50
x = 75
x = 15
x = 150

In the given question, the two angles are complementary Angle pair, so the sum of their values will add up to 90°

that is ~

5=812a+9+3

step 1: simplify both sides of the equation.

5=812a+9+3

5=(812a)+(9+3)(combine like terms)

5=812a+12

5=812a+12

step 2: flip the equation.

812a+12=5

step 3: subtract 12 from both sides.

812a+12−12=5−12

812a=−7

step 4: divide both sides by 812.

812a /812 = -7/812

a= -1/116

so the answer is

a=   -1/116