Question

Find the value of
3k-7 if k=-4

Answer 1

sub k=-4 into first equation. 3*-4=-12. -12-7=-19

Answer 2

-19

Explanation:

first substitute K for -4

3(-4)-7

then multiply 3 and -4

3 times -4=-12

-12-7=-19

Answer check

to check the answer u can just take the equation which is 3k-7 and the solution

3k-7=-19

and solve for K

add 7 on both sides

3k=-12

divide 3 on both sides

K=-4