A)(x+124)-76=357
x+48=357
x=357-48
x=309
б)375-y+218=123
593-y=123
-y=123-593
-y=-470
y=470
в)(t-27)+34=53
t-27+34=53
t+7=53
t=53-7
t=46
30×30=900м в квадрате площадь квадрата
площадь одного кружка=пи*(3,5^2)=3,4*12,5=34.465см^2,площадь 16кружков=615.44см^2
900-615.44=284.56^6площадь обрезков
6*5:10=3
5*4:10=2
4*7+19=47 47:10=4.7
5*9+44=89 89:10=8.9
6*9+100=154 154:10=15.4
9*9+1000=1081 1081:10=108.1
⁵<span>/</span>₇<span>+3</span>⁶<span>/</span>₇ <span>= 3</span>⁵⁺⁶/₇ = 3¹¹/₇ = 4⁴/₇
<span>
6</span>⁶<span>/</span>₁₃<span>-5</span>¹¹<span>/</span>₁₃<span> = 11</span>⁶⁺¹¹/₁₃ = 11¹⁹/₁₃ = 12⁶/₁₃
<span>
9</span>³<span>/</span>₁₃<span>-8</span>⁹<span>/</span>₁₃ <span>= 17</span>³⁺⁹/₁₃ = 17¹²/₁₃<span>
2</span>¹⁵<span>/</span>₁₉<span>+1</span>¹⁵<span>/</span>₁₉ = 3¹⁵⁺¹⁵/₁₉ = 3³⁰/₁₉ = 4¹¹/₁₉