Question

Determine o valor de X

A) 7× + 10 = 6 × - 5 ?

b ) 3× - 1 = - × + 3

c) 2× - 3 = × + 5 ?

d) 2 × - 3 = 33 - × ?

e) 0 = - × + 3 - 2 × + 5 ?

f) -5× + 7 - 10 = - 3 × + 13 -12 ?​

Answer 1

Esplicação passo-a-passo :

$A) 7x + 10 = 6 x - 5 \\ 7x - 6x = - 5 - 10 \\ 1x = - 15 \\ x = \frac{ - 15}{1} \\ x = - 15$

$b ) 3x - 1 = - x+ 3 \\ 3x + x = + 3 + 1 \\ 4x = + 4 \\x = \frac{4}{4} \\ x = 1$

$c) 2x - 3 = x + 5 \\ 2x - x = + 5 + 3 \\ x = 8$

$d) 2 x - 3 = 33 - x \\ 2x + x = 33 + 3 \\ 3x = 36 \\ x = \frac{36}{3} \\ x = 12$

$d) 2 x - 3 = 33 - x \\ 2x + x = 33 + 3 \\ 3x = 36 \\ x = \frac{36}{3} \\ x = 12$

$e) 0 = - x + 3 - 2 x + 5 \\ 0 = - 3x + 8 \\ 3x = 8 \\ x = \frac{8}{3}$

$f) -5x + 7 - 10 = - 3 x + 13 -12 \\ - 5 x - 3 = 3x + 13 - 12 \\ - 5 x - 3 = 3x - 1 \\ - 5x - 3x = 1 + 3 \\ - 8x = 1 + 3 \\ - 8x = 4 \\ x = - \frac{4 \div 4}{8 \div 4} \\ x = - \frac{1}{2}$

Espero ter ajudado! :D