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Published on October 8, 2026
Solve the two-step equation 11 = 4x + 7 by subtracting 7 from both sides, then dividing by 4. The solution is x = 1.
Step-by-step solutions to a variety of mathematical problems including trigonometric equations, joint variation, quadratic equations, sequence formulas, and proofs.
Learn how to find the length of a ladder leaning against a building by setting up a right triangle and applying the Pythagorean theorem with a given height and base.
Learn how to prove that the real part of the complex expression (z+1)/(z-1) is equal to zero when |z|=1 and z is not equal to 1, using complex conjugates and magnitude properties.
Prove algebraically that the expression n^2 - 2 - (n - 2)^2 is always an even number by expanding the brackets and factoring out a 2.
Solve the rational equation G/S = Y/2 for the variable S by cross-multiplying and isolating S to get S = 2G/Y.