Question

encuentra el valor de x
9x+20=10

x/20-10=5

x+16=9

9×-9=9

8×-40=40

2x-9=16
​

Answer 1

$\large \sf{9x + 20 = 10}$

$\large \sf{9x = 10 - 20}$

$\large \sf{9x = - 10}$

$\large{ \orange{ \boxed{ \orange {\boxed{ \purple{\sf{x = - \frac{10}{9} }}}}}}}$

$\large\sf{\frac{x}{20}- 10 = 5}$

$\large\sf{\frac{x}{20} = 5+10}$

$\large\sf{\frac{x}{20} = 15}$

$\large\sf{x = 15 \:\ast \:20}$

$\large{ \orange{ \boxed{ \orange {\boxed{ \purple{\sf{x = 300}}}}}}}$

$\large \sf{x + 16 = 9}$

$\large \sf{x = 9 - 16}$

$\large{ \orange{ \boxed{ \orange {\boxed{ \purple{\sf{x = - 7}}}}}}}$

$\large \sf{9x - 9 = 9}$

$\large \sf{9x = 9 + 9}$

$\large \sf{9x = 18}$

$\large \sf{x = \frac{18}{9} }$

$\large{ \orange{ \boxed{ \orange {\boxed{ \purple{\sf{x = 2}}}}}}}$

$\large \sf{8x - 40 = 40}$

$\large \sf{8x = 40 + 40}$

$\large \sf{8x = 80}$

$\large \sf{x = \frac{80}{8} }$

$\large{ \orange{ \boxed{ \orange {\boxed{ \purple{\sf{x = 10}}}}}}}$

$\large \sf{2x - 9 = 16}$

$\large \sf{2x = 16 + 9}$

$\large \sf{2x = 25}$

$\large \large{ \orange{ \boxed{ \orange {\boxed{ \purple{\sf{x = \frac{25}{2} }}}}}}}$