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If 10x +5y =15 and 5x+10y =45 what is the value of x-y |
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Answer» ong>Answer: Question✳️10x +5y =15 and 5x+10y =45 what is the value of x-ySolution ⬇️✍️10x+5y=15..(1)✍️5x+10y=45..(2)_________________ ✳️15x+15y=60.. ADDING equation 2 and 1_________________ ✍️15x+15y=60.. dividing by 15➡️x+y=4..(3)✍️10x+5y=15..(1)✍️(-)5x+(-)10y=(-)45..(2)_______________________ ✳️5x-5y=-30.. subtracting eq 2 and 1_______________________ ✍️5x-5y=-30.. dividing by 5➡️x-y=-6..(4)➡️x+y=4..(3)_____________ ✳️2x=-2.. adding equation 3 and 4_____________ ✍️ substituting value x=-1 in equation number 3➡️x+y=4..(1)✍️-1+y=4✍️y=4+1✍️y=5✳️(x,y)(-1,5) is the solution of the GIVEN quadratic equationStep-by-step explanation: hope you appreciate this ans |
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