Lcm to eliminate y

Identify the least common multiple that would eliminate the y-variable.

6x - 5y = -4
4x + 2y = 28

Correct answer:

l =  10
x =  4.125
y =  5.75

Step-by-step explanation:

5 ...  prime number 2 ...  prime number LCM(5,2)=25=10  l=LCM(5,2)=10
6x5y=4 4x+2y=28  12x10y=8 20x+10y=28 5  32x+0=8+28 5  32 x+0=8+28 5  32x=132  x=833=4.125
6x5y=4 6 4.1255y=4  6 4.1255 y=4  5y=28.75  y=423=5.75

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