solve the following equation

Question

0.2z-0.07=0.03z

Z=___________

Type an integer or a simplified fraction

Answer 1

As they require the answer as an integer (it's not) or a fraction (it is), best to convert everything to fractions first:

20z/100 - 7/100 = 3z/100 Subtract 3z/100 from both sides and add 7/100 to both sides..

17z/100 = 7/100 Divide both sides by 17/100

z = 7/100 ÷ 17/100 or 7/100 × 100/17 = 7/17 (Can't be simplified)

Easier to check if use decimals: 7/17 ≅ 0.411764

0.2(0.411764) - 0.07 = 0.03(0.411764)

0.08235 - 0.07 = 0.01235

0.01235 = 0.01235