book Maths Puzzle Numerical Ability

Please help me solve this of x:
x^2=-5x-3 -------the +- means there is a + sign with a - under it

A)x=5+-sqrt13/2
B)x=5+-sqrt13
C)x=-5+-sqrt13/2
D)x=-5+-sqrt13

Please show me how you worked this out...thanks

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book Other Question

Solve each equation.

c/4= 16
1/2x= 48
-6d= -42
19= 3y - 5
6- 5c= -29
0.4s - 3= -1
4x - 9= 7x + 12
-4(2-3x) = 7 - 2(x-3)

these are giving me a headache!
How do I solve this problem by graphing it?

2x = y + 1
2x - y = 5