aileenf598
22.03.2021 •
Mathematics
8t + 5h = 220
5t + h = 112
what is the first step?
a. rewrite one of the equations for a variable: h=112-5t
b. substitute one equation in to the other: 8t+5(112-5t)
c. substitute one equation in to the other: 8(5t+h=112)+5h=220
d. rewrite one of the equations for a variable: 5h=220-8t
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Ответ:
40
Step-by-step explanation:
let the number be 'x'
95 % of x = 38
(95 / 100)x =38
x = 38 × 100 / 95
x = 2 × 100 / 5
x = 2 × 20
x = 40