19*14 = 19*(10 + 4) = 19*10 + 19*4 = 190 + 76 = 266
(You could use the distributive property again to split 19 into 10 + 9 but that is multiplying by 19 is simple enough and using the distributive property for that is just laziness.
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It depends on the equation that is being solved.
if x+5=9 than x=4 solved by subtraction property of equality check by substation property 4+5=9
it is solved
The present perfect forms are have solved and has solved.Examples:They have solved the equation. (plural subject)He has solved the equation. (singular subject)
solved examples of normalization