Question

Solve using graphical method
2x + 5y = 20
y = 7

Solve using the substitution method.
a) y = 3x + 1
x + 2y = 16

b) y = 2x + 7
3y - 4x = 11

c) 2x + 5y = 6
y = 3 / 2x + 5

d) y = -x
y = 8x + 21

e) y = 3x - 11
y = 5x + 17

f) y = 4x - 17
y = 6x - 22


Solve using the elimination method.

a) 3x - 7y = -2
-2x - 7y = 13

b) 5x + 2y = 6
4x + 3y = 2

Answer 1

Answer:

$\frac{ - 15}{2}$

a)2

b)-5

c)12/19

d)7/3

e)-14

f)5/2