Question

[ ( 4x + 28 ). 3 + 55 ] ÷ 5 = 35

Giúp mk vs mj đang gấp 

Answer 1

\(\left[\left(4x+28\right).3+55\right]:5=35\)

\(\Rightarrow\left(4x+28\right).3+55=35.5\)

\(\Rightarrow\left(4x+28\right).3+55=175\)

\(\Rightarrow\left(4x+28\right).3=175-55\)

\(\Rightarrow\left(4x+28\right).3=120\)

\(\Rightarrow4x+28=120:3\)

\(\Rightarrow4x+28=40\)

\(\Rightarrow4x=40-28\)

\(\Rightarrow4x=12\)

\(\Rightarrow x=12:4\)

\(\Rightarrow x=3\)

Answer 2

[ ( 4x + 28 ). 3 + 55 ] ÷ 5 = 35

( 4x + 28 ). 3 + 55 = 35.5

( 4x + 28 ). 3 + 55 = 175

( 4x + 28 ). 3 = 175 - 55

( 4x + 28 ). 3 = 120

4x + 28 = 120 : 3

4x + 28 = 40

4x = 40 - 28

4x = 12

x = 12 : 4

x = 3