Question

Calcule a raiz das seguintes equaçoes f) 3x +12 = 5x +36 g) -11 -8x = -2x+55 h) -15 -11x = -9 -3x i)1045 -x =729 -3x j) x +1 +2x-1 -3x k) -13 +4 -6x = -24x +9

Answer 1

As raízes das equações são:

f)

$3x+12=5x+36\\3x-5x=36-12\\-2x=24\\x=\frac{24}{-2}\\ x=-12$

g)

$-11-8x=-2x+55\\-8x+2x=55+11\\-6x-66\\x=\frac{66}{-6} \\x=-11$

h)

$-15-11x=-9-3x\\-11x+3x=-9+15\\-8x=6\\x=\frac{6}{-8} \\x=-\frac{3}{4}$

i)

$1045-x=729-3x\\-x+3x=729-1045\\2x=-316\\x=\frac{-316}{2}\\ x=-158$

j)

k)

$-13+4-6x=-24+9\\-6x+24x=9-4+13\\18x=18\\x=\frac{18}{18} \\x=1$