What is the value of x?
to
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X=?

21

Step-by-step explanation:

We need to utilise one important angle in order to answer this question which is

→ Angles in a triangle add up to 180°

Using this information we can set up an equation to find the value of x

⇒ Form equation using the important angle fact

→ x - 4 + 3x + 100 = 180

⇒ Simplify the 'x' and the numerical terms

→ 4x + 96 = 180

⇒ Minus 96 from both sides to isolate 4x

→ 4x = 84

⇒ Divide both sides by 4 to isolate x

→ x = 21

The value of x is 21

how is that middle school

step-by-step explanation: