exam Maths Puzzle Numerical Ability

3[9-(6-3)]-10

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exam Other Question

1. 3n=(6-n)(-3)

2. -10= 4- 7x/4

3. 1/4(y+8)=5

4 7.6x + 3.7= 2.8-1.6x
Solve x^2=-6x
A) 0,6
B)6,-6
c)2,6
D)0,-6