Question

can someone help me please!
use the elimination method to solve the system of equations.
a+7b=16
a+3b=4

a. there is one solution, it is____
b. there are infinitely many solutions.
c. there is no solution.

Answer 1

Hi,

a+7b=16

a+3b=4 ||First subtract 2nd EQ from te 1st EQ to eliminate a

4b = 12

b = 3

The solve for a using one of the EQ above

, a = -5

Ordered pair(-5,3) is the solution for this system of equations

Answer 2

Subtract equation 2 froim equation 1:
a + 7b = 16
a + 3b = 4
--------------
4b = 12
Then b = 3
Now substitute 3 in for b in original eqation 1:
a + 7(3) = 16
a + 21 = 16
a = -5

Answer 3

so the solution is a= - 5?

Answer 4

The solution is :
a = -5, b = 3
You need to state what both a and b are.

Answer 5

hey mathstudent55 could you help me with my question please?

Answer 6

okay thank you very much

Answer 7

so would the correct answer that I type be, (-5,3)?

Answer 8

yes

Answer 9

okay thank you for your help.