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The number y is 4 more than 5 times another number xx. Their sum is 94. 

Find x and y 

 May 14, 2021
 #1
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y =  5x + 4       (1)

x + y = 94       (2)

 

Rearrange (2):   y = 94 - x   (3)

 

Substitute (3) into (1)

 

94 - x = 5x + 4    Collect like terms:  6x = 90,   x = 15

 

Put this back into (1)  y = 5*15 + 4    so  y = 79

 May 14, 2021

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