Question

100 points

Work out this simultaneous equation
Work out c and d
-4c+7d=29
6c+4d=0
Thank you

Answer 1

d = 3; c = -2

Explanation:

-4c+7d=29

6c+4d=0

using the second equation we express C:

6c = -4d => c = -4/6 d

substitute the resulting value into the first equation:

4 * 4/6 d + 7d = 29

58d/6 = 29

58d = 174

d = 3

now find the value of C:

c = - 4/6 * 3 = -12/6

c = -2