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3 years ago

18x-(8x-7)=67 what does 'x' equal in this equation?

Mathematics

2 answers:

Alexxandr [17]3 years ago

8 0

18x-8x+7=67
10x=60
x=6

Papessa [141]3 years ago

3 0

18x-8x +7 = 67 2 negatives = a positive
10x +7 = 67
10x +7 -7 =67-7
10x = 60
10 x ÷10 = 60 ÷10
x =6

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Answer:

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Step-by-step explanation:

* Lets change the story problem to equations and solve them to find

the answer

- Chen is bringing fruit and veggies to serve at an afternoon meeting

- He spends a total of $28.70 on 5 pints of cut veggies and 7 pints

of cut fruit

- The food cost is modeled by the equation 5 v + 7 f = 28.70, where

v represents the cost of one pint of cut veggies and f represents

the cost of one pint of cut fruit

∴ The first equation is 5 v + 7 f = 28.70 ⇒ (1)

- The cost of each pint of fruit is $2.85

∵ f represents the cost of one pint of cut fruit

∴ f = 2.85

- Substitute the value of f in equation (1) to find the value of v

∵ 5 v + 7 f = 28.70 ⇒ (1)

∵ f = 2.85

∴ 5 v + 7 (2.85) = 28.70

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