An equation ... 2 is correct. To solve any equation, you need to find the value of the unknown variable by performing the same operations on both sides. To solve an equation, more than one step ...

For example, the simultaneous equations \(3a + 2b = 17\) and \(4a - b = 30\) have no common coefficient as the coefficients of \(a\) are 3 and 4, and the coefficients of \(b\) are 2 and -1.