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Math Word Problems - GED, PSAT, SAT, ACT, GRE Preparation
2.1 Word Problems - Basic Operations With Variables - 1
Word Problems as equations
Five more than twice a number is 28.
Solution: 2x + 5 = 28
Choose the algebraic equation for the word problem given below.
: Cod's money is twice as much as Peter's money.
c = 2p
p = 2c
c = p/2
: Ben has 17 basketball trophies.
b = 17
b > 17
b < 17
: Katie has twice as many tropes and Aron.
a x k = 2
k = a x 2
a = k x 2
: 9 decreased by half a number is equal to 6.
9 - x/2 = 6
x/2 - 9 = 6
x - 9 = 6
: Jill has 4 fewer pencils than Matt.
m = j - 4
j = m + 4
j = m - 4
: Jill has 5 more pens than Kelly.
j = k - 5
k = j + 5
j = k + 5
: If Mike's allowance was increased by $6, he would be earning twice what he is now.
m + 6 = 2m
6m = m + m
6 + 2m = m
: Cathy got 10 fewer votes than Kim. Ron got three times as many votes as Cathy. The three students received a total of 90 votes. Write an equation in one variable that can be used to solve for the number of votes Kim received. (Hint: c = k - 10 r = 3c c + r + k = 90 )
c + r + k = 90
k + (k-10) + 3(k-10) = 90
c + 2r + 3k = 90
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