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0.4x + 0.3y = 1.7, 0.7x-0.2y …

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0.4x + 0.3y = 1.7, 0.7x-0.2y = 0.8

    • Posted by Ranveer Raj 1 year, 7 months ago

    CBSE > Class 10 > Mathematics
    • 3 answers

    Ansh Singh Rajput 1 year, 7 months ago

    Why are you take so much interest in solving all the questions Khushi...?

    0Thank You

    Ansh Singh Rajput 1 year, 7 months ago

    Are you the topper of your class...!

    0Thank You

    Khushi Kushwaha 1 year, 7 months ago

    4x + 3y = 17 { decimals will be removed 4/10x + 3/10y = 17/10 ( here, all the 10 will be cancel out) } ----(i) Similarly: 7x - 2y = 8 will be form by removing decimals in the same manner .----(ii) From equation --(i) ------> X = 17-3y/4 Putting value of x in 7x - 2y = 8 7(17-3y/4) - 2y = 8 119 - 21y/4 - 2y = 8 (by solving brackets) 119 - 21y - 8y /4 =8 (by taking LCM.) 119 - 29y /4 = 8 119 - 29y = 32 ( by multiplying 4 on the left hand side) - 29y = 32 - 119 -29y = - 87 ( subtract sign will be cancled ) y = 87/29 y = 3 Now finding value of x X = 17 - 3y /4 X = 17 - 3(3)/4 X = 17 -9 /4 X = 8 /4 X= 2

    2Thank You

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