Question

Resolva equacao 10-2×=3× b) 12+(3×+6).(-7)-5=1a

Answer 1

a) 10 - 2x = 3x

10 = 3x+2x

10 = 5x

x = $\frac{10}{5}$

x = 2

b) 12 + (3x+6) × (-7) - 5 = 1a

12 - 5 + (-7)(3x+6) = a

7 -21x - 42 = a

-35 -21x = a

21x = -35 - a

x = $\frac{-35 - a}{21}$

a = -35 - x