m 2.8 - 4.9 = - 7.11

From this equation, we need to find the value of m

We first isolate the variable m with its coefficient from the other values, so:

m2.8 - 4.9 = - 7.11

m2.8 = - 7.11 + 4.9

A negative and a positive will make a negative, so:

m2.8 = - 2.21

Next we isolate the variable m completely from the other value so we divide both sides by 2.8, so

m2.8 / 2.8 = - 2.21 / 2.28

m = - 0.78

Therefore the value of m is - 0.78