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# Sorry For The Unprofessional Language From My Friend, I Really Do Apoligize

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For every \$5 I earn from my job, I save \$2. For every \$4 I save from my job, I am given an additional \$1 from my parents to add to my saving. How much must I earn in order to have \$40 in savings?

Jan 10, 2019

#1
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x = # \$5 unit you earn

2x = amount you save per unit

2x/4  = amount from parents

2x + 2x/4 = 40

10x/4 = 40

10x=160

x = 16   \$5 units    = \$80     (oops....corrected   16 x5 = 80   not 75 as I originally posted)

Jan 10, 2019
edited by ElectricPavlov  Jan 10, 2019
edited by ElectricPavlov  Jan 10, 2019
edited by ElectricPavlov  Jan 10, 2019
#2
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We have this equation

( [ E / 5 ] *2 )  + [  ( [ E / 5 ] ) * 2 ]  / 4  =  40       where E is the amount you earn

Simplify

(2/5)E  + (1/10)E = 40

(4/10)E + (1/10)E = 40

(5/10)E =  40

(1/2)E = 40       multiply by 2

E  = 80

Check

For \$80  you will save   (80 / 5) * 2 = 16 * 2 =    \$32

And your parents give you   32/4 =  \$8   more   Jan 10, 2019