42
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There are infinitely many possible answer.They all take the form {6, 6, 7, x and 26-x} where 7 < x < 13.For example, {6, 6, 7, 7.1 and 18.9}or {6, 6, 7, 11, 15}There are infinitely many possible answer.They all take the form {6, 6, 7, x and 26-x} where 7 < x < 13.For example, {6, 6, 7, 7.1 and 18.9}or {6, 6, 7, 11, 15}There are infinitely many possible answer.They all take the form {6, 6, 7, x and 26-x} where 7 < x < 13.For example, {6, 6, 7, 7.1 and 18.9}or {6, 6, 7, 11, 15}There are infinitely many possible answer.They all take the form {6, 6, 7, x and 26-x} where 7 < x < 13.For example, {6, 6, 7, 7.1 and 18.9}or {6, 6, 7, 11, 15}
X/7 = 6 multiply both sides by 7/1 (7/1)(X/7) = (6)(7/1) 7 cancels on left X = 42 ----------------check in original equation 42/7 = 6 6 = 6 ----------checks
5.5 x 6 x 7 = 231
-x2 + x + 42 = -[x2 - x - 42] = -[x2 - 7x + 6x - 42] = -[x*(x - 7) + 6*(x - 7)] = -(x - 7)*(x + 6)
7 x 7 x 7 x 7 x 7 x 7