Question

$3(7 \times + 8) = 24 \\ \\ \\ 100 \times + 10 = 10 \\ \\ \\ 3( \times + 5) = 72 \\ \\ \\ 300 \times - 10 = 1190 \\ \\ \\ \frac{3 \times }{9} = 2 \\ \\ \\ 7 \times - 12 = 5 \times + 8 \\ \\ \\ 4 \times - 3 = 2 \times + 1 \\ \\ \\ 100 - \times = 79 \\ \\ \\ \frac{36}{ \times } = 2 \\ \\ \\ 2 \times - 18 = \times + 1 \\ \\ \\ 2 \times - 5 = 77 \\ \\ \\ agradeceri \: mucho \: qu \: me \: ayudsen \: azucena \: me \: ayuda$
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Answer 1

Creo que es así:

a) 3(7x + 8) = 24

$7x + 8 = \frac{24}{3}$

$7x + 8 = 8$

$7x = 8 - 8$

$7x = 0$

Todo número dividido con cero es cero.

$x = \frac{0}{7} = 0$

$x = 0$

b) 100x + 10 = 10

$100x + 10 = 10$

$100x = 10 - 10$

$100x = 0$

$x = 0$

c) 3(x + 5) = 72

$x + 5 = \frac{72}{3}$

$x + 5 = 24$

$x = 24 - 5$

$x = 19$

d) 300x - 10 = 1190

$300x = 1190 + 10$

$300x = 1200$

$x = \frac{1200}{300}$

$x = 4$

$e) \: \frac{3x}{9} = 2$

$3x = 2 \times 9$

$3x = 18$

$x = \frac{18}{3}$

$x = 6$

f) 7x - 12 = 5x + 8

$7x - 5x = 8 + 12$

$2x = 20$

$x = \frac{20}{2}$

$x = 10$

g) 4x - 3 = 2x + 1

$4x - 2x = 1 + 3$

$2x = 4$

$x = \frac{4}{2}$

$x = 2$

h) 100 - x = 79

$- x = 79 - 100$

$- x = - 21$

$x = 21$

$i) \: \frac{36}{x} = 2$

$36 = 2x$

$2x = 36$

$x =\frac{36}{2}$

$x = 18$

j) 2x - 18 = x + 1

$2x - x = 1 + 18$

$x = 19$

k) 2x - 5 = 77

$2x = 77 + 5$

$2x = 82$

$x = \frac{82}{2}$

$x = 41$

Espero haber ayudado.