3+5.2x=1-2.8x
1. 3+5.2x+2.8x=1
2. 5.2x+2.8x=1-3
5.2x+2.8x=1-3
1. 8x=1-3
2. 8x=-2
8x=-2
1. =-(1/4)
Alternative form:
2. x=-0.25
For this problem, let x be the number of children and y for adults. Formulate the equations: 1st equation, x + y = 3,200 and 2nd equation 5x + 9y = 24,000. Re-arrange 1st equation into x = 3200 - y. Then, substitute into 2nd equation, 5(3,200-y) + 9y = 24,000. Then, solve for y. The 16,000 - 5y + 9y = 24000. Final answer is, y = 2000 adults went to watch the movie.
1/10= .1 of a meter
1/10 of 1/100= .001 of a meter
