5
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u work backwards. u start with ur answer, -10. then u add 5 instead of subtracting. ur problem then becomes -10+5. the answer being -5.
working backwards is the simplest method of algebra.
-Nicci
If you need a proof, do this:
x-5=-10 Given
x-5+5=10+5 Addition Property of Equality
x=15 Simplification
-Mark
x5 is an expression, not an equation nor an inequality. An expression cannot be solved.
Assuming that the question is find x in x5=1610; the answer is 4.378901
For the equation: x5+7x3-30x=0 The highest exponent in the entire equation is 5 (from x5), so the equation is of degree 5.
x5 = x3 times x2. In this case x3 = 64 so x = cube root of 64 ie 4
1,565 = x5 1,5651/5 = (x5)1/5 1,5651/5 = x5/5 1,5651/5 = x 4.3541 = x