Question

Ajutati-ma Cu Aceste Ecuatii Pls:

1. (5x-32):4=17

2. ( z : 9 ) · 15 - 47 = 28

3. 93 + 56 : ( 14 - y ) = 100

Answer 1

$(5x - 32) \div 4 = 17 \\ \\ 5x - 32 = 17 \times 4 \\ \\ 5x - 32 = 68 \\ \\ 5x = 68 + 32 \\ \\ 5x = 100 \\ \\ x = 100 \div 5 \\ \\ x = 20 \\ \\ (z \div 9) \times 15 - 47 = 28 \\ \\ (z \div 9) \times 15 = 28 + 47 = 75 \\ \\ z \div 9 = 75 \div 15 = 5 \\ \\ z \div 9 = 5 \\ \\ z = 9 \times 5 \\ \\ z = 45$

Answer 2

1) (5x-32):4=17
5x-32=17·4
5x-32=68
5x=68+32
5x=100
x= $\frac{100}{5}$
x=20

2) (z:9)·15-47=28
(z:9)·5=28+47
(z:9)·15=75
z:9= $\frac{75}{15}$
z:9=5
z=5·9
z=45

3) 93+56:(14-y)=100
149:(14-y)=100
149:(-100)=-14+y
-1,49=-14+y
y=12,51