lovelymae
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the sum of two numbera is 122. the second number is 18 less than three times the first number. find the numbers. help please!

Respuesta :

citroen
so you can write two equations
x + y = 122
y = 3*x - 18
by substitution:
x + (3x - 18) = 122
now you simplify:
4x - 18 = 122
4x = 140
x = 35
to find y, you can use the first equation
35 + y = 122
y = 87

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