The sum of three numbers is 8. The third is 9 less than 8 times the second. 10 times the
first is 7 less than 8 times the second. Find
the numbers.

→ First value is 1

→ Second value is 2

→ Third value is 5

Step-by-step explanation:

• let numbers be x, y and z

• from eqn 2, make x the subject:

• substitute all variables in eqn 3:

• find z

• find x:

Rounding to nearest value:

a=1

b=2

c=5

Step-by-step explanation:

..................

-14

step-by-step explanation:

2x2 – 2(x+4)

=2x2-2（5+4）

=4-2×9

=4-18

=-14

it's both, now can you answer my most recent question?