147+13х,если х=13
147+13*13=147+169=316
<span>(17x+7)*16=3376
272х+112=3376
272х=3264
х=12</span>
П<k на 3
г> k
и чо найти надо????????????????????????
2 4/7(4 2/9 + 1 2/9) = 2 4/7 * 5 4/9 = 18/7 * 49/9 = 14
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6 2/3(2 5/6 + 3/10 - 1 1/3) = 6 2/3 (( 5 - 1)+ (5/6+3/10-1/3)) =
= 20/3 * (4 +25/30+9/30-10/30) = 20/3 * 4 24/30 = 20/3 * 4 4/5 =
= 20/3 * 24/5 = 32