How many centimeters equal 9 meters

Which shows the correct solution of the equation 1/2a+2/3b=50, when b=30?

Solve this equation using substitution. {4x + y = −2} {4x + 6y = 44}

Type the correct answer in the box. consider the system of linear equations below. rewrite one of the two equations above in the form ax + by = c, where a, b, and c are constants, so that the sum of the new equation and the unchanged equation from the original system results in an equation in one variable.