Step-by-step explanation:
β§ [tex] \underline{ \underline{ \large{ \tt{S \: O \: L \: U \: T \: I \: O \: N}}}} : [/tex]
~Set up an equation and solve for x :
[tex] \large{ \tt2x \degree - 21 \degree = 87 \degree}[/tex] [ Being alternate angles ]
Since we want to get rid of constant on left hand side , add 21 on both sides :
βΏ [tex] \large{ \tt{2x - 21 \degree + 21 \degree = 87 \degree + 21 \degree}}[/tex]
βΏ [tex] \large{ \tt{2x \degree = 108 \degree}}[/tex]
Divide both sides by 2
βΏ [tex] \large{ \tt{ \frac{2x}{2} = \frac{108}{2} \degree}}[/tex]
βΏ [tex] \large{ \tt{x = 54 \degree}}[/tex]
β₯ [tex] \boxed{ \boxed{ \large{ \text{Our \: Final \: Answer : } \underline{ \tt{x = 54\degree}}}}}[/tex]
Hope I helped ! β‘
Have a wonderful day / night ! βͺ
βLet me know if you have any questions regarding my answer! γ
[tex] \underline{ \underline{ \mathfrak{Carry \: On \: Learning}}} [/tex] !! β
ββββββββββββββββββββββββββ
