Question

Află necunoscutele. a) 10 x 10 x 10 – (100 – 2 x X – 6 x 10) x 10 = 900 - - -​

Answer 1

1000-(100-2x-60)•10= 900
1000-(1000-20x-600)=900
1000-20x-600=100
1000-20x=700
20x=300
x=15

Answer 2

1000 - 100-2x - 60 ×10=900

2x= 1000-100-600=900 | : 300

2x = 900-600=300

2x = 300 |:2

x = 150