Question

1)найдите 33% от95

2)71,3-2,1×(x+8,1)=47,57

3)

(0,235+0,465)×5,3
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(4,-2,9)×0,1


срочно очень срочно пожалуйста

Answer 1

1) 95×0,33 = 31,35

2)
$71.3 - 2.1(x + 8.1) = 47.57 \\ 71.3 - 2.1x - 17.01 = 47.57 \\ 54.29 - 2.1x = 47.57 \\ - 2.1x = 47.57 - 54.29 \\ - 2.1x = - 6.72 \\ x = - 6.72 \div ( - 2.1) \\ x = - 67.2 \div ( - 21) \\ x = 3.2$
3)
$\frac{(0.235 + 0.465) \times 5.3}{(4 - 2.9) \times 0.1} = \frac{0.7 \times 5.3}{1.1 \times 0.1} = \frac{3.71}{0.11} = \frac{371}{11} = 33 \frac{8}{11}$