Question

lets see who can answer this question correctly​

Answer 1

Answer:

(5x+x+3x)+(4+7-2)=180

Step-by-step explanation:

9x+9=180

9x=171

x=19

Answer 2

Step-by-step explanation:

$\displaystyle{ \pink{ \sf{Solution : }}}$

As we can see that it's forming a linear pair. So,

$\displaystyle{ \sf{ \implies {(5x + 4)}^{ \circ} + {(x - 2)}^{ \circ} + {(3x + 7)}^{ \circ} = {180}^{ \circ} }}$

$\displaystyle{ \sf{ \implies5x + x + 3x + 4 - 2 + 7 = {180}^{ \circ} }}$

$\displaystyle{ \sf{ \implies9x + 4 + 7 - 2 = {180}^{ \circ} }}$

$\displaystyle{ \sf{ \implies9x + 11 - 2 = {180}^{ \circ} }}$

$\displaystyle{ \sf{ \implies9x + 9 = {180}^{ \circ} }}$

$\displaystyle{ \sf{ \implies9x = 180 - 9}}$

$\displaystyle{ \sf{ \implies9x = 171}}$

$\displaystyle{ \sf{ \implies \: x = \frac{ \cancel{171}}{ \cancel{9}} }}$

$\displaystyle{ \sf{ \implies \: x = 19}}$

∴ Value of x is 19°.