Question

b) 23x + 2 =2

c) 12- 7 +4x =25

d) 5x - 3x =30

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Answer 1

Letra B:

$\sf     23x + 2 = 2 \\ \\ \sf     23x = 2 - 2 \\ \\ \sf     x = \frac{0}{23} \\ \\ {\color{Blue}\sf     x = 0}$

Letra C:

$\sf     12 - 7 + 4x = 25 \\ \\ \sf     4x = 25 - 12 + 7 \\ \\ \sf     4x = 13 + 7 \\ \\ \sf     4x = 20 \\ \\ \sf     x = \frac{20}{4} \\ \\ \sf   {\color{Blue}  x = 5}$

Letra D:

$\sf     5x - 3x = 30 \\ \\ \sf     2x = 30 \\ \\ \sf     x = \frac{30}{2} \\ \\ \sf    {\color{Blue} x = 15}$

Att: Nerd1990