book Maths Puzzle Numerical Ability

what does x equal in this equation?

-2w+4=-8

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book Other Question

It is possible for a triangle to be which of the following?

A) both isosceles and right
B) both equilateral and equiangular
C) both scalene and acute
D) both obtuse and equilateral 22 is 80% of what?/ 32 is whatt percent of 56?/ and if x is 8 when y is 18, and x and y vary directly, what is the value of y when x is 10?