Question

Is 7 a solution for -7 = -56 + 7t yes or no

Answer 1

Answer:

yes

Step-by-step explanation:

multiply 7x7 and you will get 49. Then do 49- 56 and you will get -7. So the statement is true.

Answer 2

Answer:

YES

Step-by-step explanation:

$\bold{METHOD\ 1:}\\\\\text{Put}\ t=7\ \text{to the equation}\ -7=-56+7t,\ \text{and check equality}\\\\-7=-56+7(7)\\-7=-56+49\\-7=-7\qquad\bold{CORRECT}$

$\bold{METHOD\ 2:}\\\text{solve the equation:}\\\\-7=-56+7t\qquad\text{add 56 to both sides}\\\\-7+56=-56+56+7t\\\\49=7t\qquad\text{divide both sides by 7}\\\\\dfrac{49}{7}=\dfrac{7t}{7}\\\\7=t\to t=7$