Day 21 HW
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For each of the following systems of equations, determine which method (substitution or elimination) would be easiest. You do *not* need to solve them.
2x + 5y = 2 and 3x – 5y = 53
Substitution
Elimination
4x + 2y = 34 and 10x – 4y = 5
Substitution
Elimination
x = y + 5 and 3x – 4y = 10
Substitution
Elimination
y = 4x – 8 and y = 2x + 3
Substitution
Elimination
7x + 8y = 25 and 9x + 10y = 35
Substitution
Elimination
2x + y = 6 and 3x – 4y = 10
Substitution
Elimination
x + y = 10 and 5x + 10y = 250
Substitution
Elimination
3x + 4y = 9 and 5x + 14y = 37
Substitution
Elimination
Write a general rule for deciding whether to use the substitution method or the elimination method. Use complete sentences.
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