Answer:
x = -3, -5.
Step-by-step explanation:
(2x + 8)/6 = 1/3(x + 4)
Cross multiply:
(2x + 8)(x + 4) = 6 * 1/3
(2x + 8)(x + 4) = 2
2x^2 + 16x + 32 - 2 = 0
2x^2 + 16x + 30 = 0
x^2 + 8x + 15 = 0
(x + 3)(x + 5) = 0
x = -3, -5.
-4 is real and partially complex, since it does not exist in all situations involving numbers, but is still a widely used number that can be real when calculating.
Hope this helps!
#25
210 / 0.42 = 500
answer: 500 people were surveyed
#18
22.50 x 1.15 = 25.875
answer: $25.88 (third choice)
#19
550 x 0.07 = $38.50
answer: $38.50 (third choice)
#20
$160 x 0.4 = $64
answer: $64 (third choice)