Problem # 1
3w-10=4w+5
(3w-10) + (10-4w) = (4w+5) + (10-4w)
(3w-10) + (-4w+10) = (4w+5) + (-4w +10)
3w-10-4w+10 = 4w +5 -4w +10
3w-4w=15
-w=15
w= -15 (w is negative 15)
problem #2.
6-2t > 18
6-2t-6 > 18-6
-2t > 12
(-1) (-2t) > 12 (-1)
2t > -12
next divide by 2
2t/2 > -12/2
t > -6 (t is greater then negative 6)
Divide them both ways.
250 / 8 = 31.25 miles per gallon
8 / 250 = 0.032 gallons per mile
3x - 7 = 5
+ 7 + 7
3x = 12
3 3
x = 4
6x - 8
6(4) - 8
24 - 8
16
