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Use the substitution method to solve the system of equations. Please help me get this question right

Use the substitution method to solve the system of equations. Please help me get this question right class=

Answer :

KingTreeBrainly

Answer:  B (2,1)

You know what y is (x-1) so you substitute that for y in the other equation.

3x+ ((4)(x-1))=10

3x+4x-4=10

7x=14

x=2

Then put x=2 into y=x-1

y=2-1

y=1

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