solve equations
5x + 2 + 2x = 23
x = 3
9x + 24 = -3x
one
x = -2
D = RT
solve for R
R = D / T
5x + y = -8
y = -5x - 8
Nine times the difference of two and a number is thirty-six.
9(2 - x) = 36
x = -2
3x + x - 8 = 4
x = 3
24x - 8 - 10x = -2(4 - 7x)
infinite solutions
I = PRT
solve for R
R = I / PT
2x - y = 5
y = 2x - 5
Julie is 3 years older than her sister. Julie's age is 11 years old. How old is her sister?
x + 3 = 11
x = 8 so 8 yrs old
3x + 12 = -9 + 6x
x = 7
9(-5 - x) = -10 - 2x
one
x = -5
P = 2(L + W)
solve for L
L = (P - 2W) / 2
15x + 5y = 45
y = 9 - 3x
Mr. Cushman bought 7 Hannah Montana t-shirts for a total of $91. Each t-shirt cost the same amount. How many Hannah Montana t-shirts did Mr. Cushman buy?
7x = 91
x = 13 so 13 t-shirts
3y - 6 = 14 + 5y - 10
y = -5
2x - 5x + 11 = 2 - 3x + 9
infinite solutions
R = pV / nT
solve for p
p = (RnT) / V
12x - 2y = 13
y = 6x - 6.5
Tyler has 4 boxes of apples. Each box has the same number of apples. After Tyler eats 3 apples, there are 109 apples left in the boxes. How many apples were in each box?
4x - 3 = 109
x = 28 so 28 apples
-2(4 - x) - 7 = 5
x = 10
6y - 3 = 10 - 6(2 - y)
no solution
S = B + 1/2PL
solve for P
P = 2(S - B) / L
y/5 - 7 = -2x
y = -10x + 35
Mr. Bucci goes to the grocery store and purchases 17 bags of raisins and a $2.97 jar of peanut butter. His total cost was $34.76. What was the cost for a bag of raisins?
17x + 2.97 = 34.76
x = 1.87 so $1.87