Question

solve each system of equations
4a-3b=17
5a+4b-16

Answer 1

x ist equn. by 4 and second by 3:
16a - 12b = 68
15a + 12b = 48
add
31a = 116
a = 116/31 = 3.7419
plug this into first equation
4 * 3.7419 - 3b = 17
b = (4 * 3.7419 - 17) / 3
= -0.6774

Answer 2

huh ?

Answer 3

what does a EQUAL and what does B equal ?

Answer 4

a = 3.7419
b = -0.6774

Answer 5

do u understand how it was done? - ill willingly explain

Answer 6

please do jiimmyrep

Answer 7

you can add or subtract equations just like numbers or albegraic terms
you do this to make the numbers in front of the 'a' or 'b' terms the same
i chose the b terms -by multiplying the first equation by 4 and second by 3 i got -12b
and +12b. Note you have to multiply every term in the equations.
Now by adding the new equations the 'b' terms are eliminated and you get an equation in a only. solve this for a . Then plug the values of a into one of the first equations to get the value of b.