Question

5c - d - 11 = 0
4d + 3c = -5 find value of c and d.

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Answer 1

Step-by-step explanation:

(5c-d = 11)×3. ⟩ 15c-3d = 33

(3c+4d = -5)×5 ⟩ 15c+20d = -25

therefore, (15c-3d) - (15c+20d) = 33 -(-25)

-3d-20d = 58

d = -58/23

now, 5c-d = 11

5c-(-58/23) = 11

115c+58 = 253

115c = 253-58 = 195

c = 195/115 = 39/23

c = 29/33

Answer 2

Answer:

d = 8.45

c = 1.69

Step-by-step explanation:

5c - d = 11 (1)

4d +3c = -5 (2)

5c - 11 = d (3)

putting value second equation of (d)

4(5c -11) +3c = -5

20c - 44 + 3c = -5

23c = -5 +44

c = 39÷23

c =1.69

putting c value in equation 3

5×1.69 - 11 = d

8.45 = d