Question

aflati numarul natural x pentru care:
3×{10+2×[40-2×(28-3×5)]}-7x=51
Raspundeti acum va roggggggggg!!!!!​

Answer 1

Răspuns:

Explicație pas cu pas:

3*{10+2*[40-2*(28-15)]}-7x=51

3*{10+2*[40-2*13]}-7x=51

3*{10+2*[40-26]-7x=51

3*{10+2*14}-7x=51

3*{10+28}-7x=51

3*38-7x=51

114-7x=51

114-51=7x

63=7x

x=63/7

x=9

Answer 2

3{10+2[40-2(28-3•5)]} -7x = 51

3{10+2[40-2(28-15)]} -7x = 51

3{10+2[40-2•13]} -7x = 51

3{10+2[40-26]} -7x = 51

3{10+2•14} -7x = 51

3{10+28} -7x = 51

30 + 84 - 7x = 51

114 - 7x = 51

7x = 114 - 51

7x = 63

x = 9