Question

tìm x, biết : 100-7(x-5) = 58

Answer 1

100 - 7 . ( x - 5 ) = 58

93 . x - 5 = 58

x - 5 =93 : 58 

x - 5 = 1.6

x = 1.6 +5

x = 6.6

Answer 2

100-7.(x-5)=58

     7.(x-5)=100-58

    7.(x-5)=42

        x-5=42:7

        x-5=7

           x=7+5

           x=12

vậy x=12 

       

Answer 3

100-7x(x-5)=58
 7x(x-5)=100-58=42
x-5= 42:7=6
x=6+5
x=11