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Solve the system by addition. Give the y-value of the solution.
3x + 2y = 22 and 5x + 3y = 35

Sagot :

apologiabiology
so we need to cancel out one of the placeholders
lets cancel out he y terms

3x+2y=22
5x+3y=35
multply first equation by 3 and second by -2
9x+6y=66
-10x-6y=7=-70
add them together
9x-10x+6y-6y=66-70
-x=-4
multipoly -1
x=4

subsitute
3(4)+2y=22
12+2y=22
subtract 12
2y=10
divide 2
y=5

x=4
y=5
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