InterviewSolution
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InterviewSolution
| 1. |
Solve this pair of linear equations in two variables using substitution method X+y =75x+12y=7 |
| Answer» X+y=7-------(1)5x+12y=7-------(2)From equation (1) -----> X+y=7 =X=7-ySubstitute equation (1) in equation (2)=5(7-y)+12y=7=35 - 5y + 12y = 77y = 7 - 357y = -28Y= -28/7Y= -4 Substitute y= -4 in equation (1)X+(-4) =7X -4 =7X=7+4X=11X=(11) and y=(-4) | |