Question

21 - 7∆ = 4 - 8∆ 5∆ - 3 + 3∆ = ∆ + 7 + 6∆solve these.

Answer 1

We are given the following equation:

`21-7\Delta=4-8\Delta`

We need to solve for delta, to do that we will first add 8delta on both sides:

`21-7\Delta+8\Delta=4-8\Delta+8\Delta`

Now we add like terms:

`21+\Delta=4`

Now we subtract 21 on both sides:

`21-21+\Delta=4-21`

Adding like terms:

`\Delta=17`

Therefore delta is 17