Mathematics
RowenaAmescua145
13

solve the system by either substitution or elimination 3x-5y=21 2x+y=1

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(1) Answers
terrydavis1206

Hello 3x - 5y = 21 2x + y = 1 We need to solve 2x+y=1 for y So now we have, y = -2x +1 Substitute -2x +1 for y in 3x-5y = 21 3x - 5y = 21 3x -5 (-2x+1)=21 3x + 10x -5=  21 13x -5 = 21 13x = 21+5 13x = 26 x= 26/13 x= 2  Now we have the value of x, with that we can find the value for y let's do that by substitute 2 for x in y = -2x +1 y = -2x +1 y= -2(2) +1 y= -4 +1 y= -3 Final answer : Y= -3 and x= 2 I hope that's help !  

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