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One number is 4 more than 3 times another. Find the numbers if their sum is 52


Sagot :

R: Let x = the number
    4+3x= another number
E: x+4+3x=52
S: x+4+3x=52
    4x+4=52
    4x=48
    x=12; 4+3x=40
A: The numbers are 12 and 40.
C: x+4+3x=52
    12+4+3(12)=52
    16+36=52
    52=52
x-first number
y-another number

x=3y+4

x+y=52
Substitute:
3y+4+y=52
Add like terms
4y+4=52
Subtract both sides by 4 to remove the 4 on the left
4y=48
Divide both sides by 4
y=12

x=3y+4
Substitute
x=3(12)+4
x=36+4
Add like terms
x=40

Hope this helps =)