Concrete tiles are made using buckets of sand, cement and gravel mixed in the ratio 1: 4: 6 how many buckets of gravel are needed for 4 buckets of cement.

You move the constant to the right side and change its sign to be 9z= -6 -8. that’s the first step.the second step would be calculate the difference of -8-6 to get -14. you equation should now be 9z=-14the last step is to divide both sides by 9 to get z=-14/9hope this

4.8 is the