1.(x+x+3)*2=18
2x+2x+6=18
4x=12
x=3
ответ: одна сторона 3 другая 6
2.360-140=220
220/2=110
ответ:110 110 70 70
3.3
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Answers & Comments
1.(x+x+3)*2=18
2x+2x+6=18
4x=12
x=3
ответ: одна сторона 3 другая 6
2.360-140=220
220/2=110
ответ:110 110 70 70
3.3![3^{2}+5^{2}=x^{2} \\9+25=x^{2} \\34=x^{2} \\х=\sqrt{34} 3^{2}+5^{2}=x^{2} \\9+25=x^{2} \\34=x^{2} \\х=\sqrt{34}](https://tex.z-dn.net/?f=3%5E%7B2%7D%2B5%5E%7B2%7D%3Dx%5E%7B2%7D%20%5C%5C9%2B25%3Dx%5E%7B2%7D%20%5C%5C34%3Dx%5E%7B2%7D%20%5C%5C%D1%85%3D%5Csqrt%7B34%7D)