15x-8y=28and 17x-12y=75 it is of class 10 plz solve it it is from linear equation in two variable .
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Ashreya245:
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15x-8y=28. ... (I)
17x-12y=75. ... (II)
by multiplying equation (I) by 3 and equation (II) by 2 we get
45x-24y=84. ... (III)
34x-24y=150. ... (IV)
by subtracting equation (III) from equation (IV) we get
-11x=66
x=-6
putting x=-6 in equation (I) we get
15 (-6)-8y=28
-90-8y=28
-8y=118
y=-59/4
17x-12y=75. ... (II)
by multiplying equation (I) by 3 and equation (II) by 2 we get
45x-24y=84. ... (III)
34x-24y=150. ... (IV)
by subtracting equation (III) from equation (IV) we get
-11x=66
x=-6
putting x=-6 in equation (I) we get
15 (-6)-8y=28
-90-8y=28
-8y=118
y=-59/4
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