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2*x^8-5*x^7+12*x^3+x+6

Try entering 2x+ 3 =15 @ x = 6 into the text box. After you enter the expression, Algebra Calculator will plug x = 6 in for the equation 2x+ 3 =15: 2 (6)+ 3 = 15.
Simplifying x + 3 + x + 4 = x + 7 + 2x + 7 Reorder the terms: 3 + 4 + x + x = x + 7 + 2x + 7 Combine like terms: 3 + 4 = 7 7 + x + x = x + 7 + 2x + 7 Combine like.
Simplifying - 6 + 2x + 3x = 29 Combine like terms: 2x + 3x = 5x - 6 + 5x = 29 like terms: 29 + 6 = 35 5x = 35 Divide each side by '5'. x = 7 Simplifying x = 7. Times Tables Song 2 Slow Version - Multiply by two for beginners