If 5u=30, 6v = -12, and 2w= -8, then the value of u+4v-7w is:a.20b.22c.24d.26

First, we need to find the values of u, v, and w from the given equations.

From 5u = 30, we can find u by dividing both sides by 5. This gives us u = 30/5 = 6.

From 6v = -12, we can find v by dividing both sides by 6. This gives us v = -12/6 = -2.

From 2w = -8, we can find w by dividing both sides by 2. This gives us w = -8/2 = -4.

Now, we can substitute these values into the equation u + 4v - 7w.

This gives us 6 + 4(-2) - 7(-4) = 6 - 8 + 28 = 26.

So, the value of u + 4v - 7w is 26 (option d).