Question

cual es la ecuacion de 7x+13=4x+28. x+2x=18. 7-4=9x-10. 2x+8=3x. 4x-9+x=2x+8-x+3.
12-2x1=8-2+3x y su comprobacion de todos eso por faaaa

Answer 1

Explicación paso a paso:

$7x + 13 = 4x + 28 \\ 7x - 4x = 28 - 13 \\ 3x = 15 \\ x = 15 \div 3 \\ x = 5 \\ comprobación \\ 7 \times 5 + 13 = 4 \times 5 + 28 \\ 35 + 13 = 20 + 28 \\ 48 = 48$

$x + 2x = 18 \\ 3x = 18 \\ x = 18 \div 3 \\ x = 6 \\ comprobación \\ 6 + 2 \times 6 = 18 \\ 6 + 12 = 18 \\ 18 = 18$

$7 - 4 = 9x - 10 \\ 3 = 9x - 10 \\ - 9x = - 10 - 3 \\ - 9x = - 13 \\ x = \frac{13}{9} \\ comprobación \\ 7 - 4 = 9 \times \frac{13}{9 } - 10 \\ \\ 3 = \frac{117}{9} - 10 \\ \\ 3 = \frac{117 - 90}{3} \\ \\ 3 = \frac{27}{9} \\ \\ 3 = 3$

$2x + 8 = 3x \\ 2x - 3x = - 8 \\ - 1x = - 8 \\ x = 8 \\ comprobación \\ 2 \times 8 + 8 = 3 \times 8 \\ 16 + 8 = 24 \\ 24 = 24$

$4x - 9 + x = 2x + 8 - x + 3 \\ 5x - 9 = 1x + 11 \\ 5x - 1x = 11 + 9 \\ 4x = 20 \\ x = 20 \div 4 \\ x = 5 \\ comprobación \\ 5 \times 5 - 9 = 1 \times 5 + 11 \\ 25 - 9 = 5 + 11 \\ 16 = 16$

$12 - 2x1 = 8 - 2 + 3x \\ 12 - 2x = 6 + 3x \\ - 2x - 3x = 6 - 12 \\ - 5x = - 6 \\ x = \frac{6}{5} \\ comprobación \\ \: 12 - 2 \times \frac{6}{5} \times 1 = 8 - 2 + 3 \times \frac{6}{5} \\ 12 - \frac{12}{5} = 6 + \frac{18}{5} \\ \\ \frac{60 - 12}{5} = \frac{30 + 18}{5} \\ \\ \frac{48}{5} = \frac{48}{5}$