7 multiplied by 3/4 is your equation now to solve it to get the value you will put a one as the denominator of 7 so it will be 7/1 now multiply the numerators first 7*3=21 and then multiply the denominators 1*4= 4 you will get 21/4 if you need it as a mixed number it would be 5 1/4 to check your answer multiply 4 by 5 the whole number plus the numerator. Hope this helps.
0.89 = a * 2 + b and 2.09 = a * 5 + b => => 2.09 - 0.89 = a * 5 + a * 2 + b - b => 1.20 = 3 * a => a = 1.20 / 3 => a = 0.40; b = 0.89 - 0.40 * 2 => b = 0.89 - 0.80 => b = 0.09;
y = 0.40x + 0.09 => 0.40x - y + 0.09 = 0 is the linear equation.
