Question

12b-7(b+4)=26-4b 12b-7b-28=26-4b 5b+4b=26+28 9b=54 b=54/9 b=6 Сделайте проверку уравнению!

Answer 1

12·6-7·(6+4)=26-4·6
72-7·10=26-24
72-70=26-24
2=2

Сделать проверку очень просто: подставь на место неизвестного числа свой результат и подсчитай.

Answer 2

Let's check the solution by substituting the value of b back into the original equation:

Original equation: 12b - 7(b + 4) = 26 - 4b

Substitute b = 6:

12(6) - 7(6 + 4) = 26 - 4(6)

Simplify both sides:

72 - 7(10) = 26 - 24

72 - 70 = 2

2 = 2

Since both sides of the equation are equal when b = 6, the solution is correct.

So, b = 6 is indeed the solution to the equation.