The turner and his pupil together for change turned 130 details. How many details were turned by each of them if a part of details which was turned by the turner reduced by 3 times, was equal to details which were turned by the pupil, increased by 4 times? I will give 14 balls. Thank you

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Let x - details the pupil let turned at - details the turner then the 4th = turned at: 3 x + at = 130 at = the 130th 4th = (130th): 3 of the 4х*3=130th - x the 12th + x =130 the 13th =130 x =10 - details were turned by the pupil 130-10 = 120 - details the turner turned the answer: 120 and 10
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Answer add