Question

a)-15 +32x = -111
b) 78x+8 = 37 x +49
c)-9 (-x+5) +6(2x+7)=-3​

Answer 1

Vamos lá !!

• Letra A

$- 15x + 32 = - 111$

$- 15x = - 111 - 32$

$- 15x = - 143 \times ( - 1)$

$15x = 143$

$\boxed{\red{x = \frac{143}{15} }}$

• Letra B

$78x + 8 = 37x + 49$

$78x - 37x = 49 - 8$

$41x = 41$

$x = \frac{41}{41}$

$\boxed{\red{x = 1}}$

• Letra C

$- 9( - x + 5) + 6(2x + 7) = - 3$

$+ 9x - 45 + 12x + 42 = - 3$

$9x + 12x = - 3 - 42 + 45$

$21x = 0$

$x = \frac{0}{21}$

$\boxed{\red{x = 0}}$

Bons estudos .