2b
2a+5
54
Multiply the entire expression by a least common multiple and then simplify the expression. In this case, the least common multiple is 30 so multiply the entire expression by 30 and simplify.
3b -1
All that you can do is to simplify the left hand side of the "equation" to the expression 2x + 6y + 1. Since the right hand side of the original "equation" is not given, it is, in fact an expression and cannot be solved. In any case, one linear equation in two variables cannot be solved.
7g-10h
To put a plus or minus sign with the digit 5
2a+5
minus a minus is plus, so it's -8 + 3, which is 3 - 8, or -5
- - x + 3 = x + 3
54
Multiply the entire expression by a least common multiple and then simplify the expression. In this case, the least common multiple is 30 so multiply the entire expression by 30 and simplify.
3b -1
Negative 12 minus 3 plus 9 is equal to -6
7(3y-2)-(-4y+9)
All that you can do is to simplify the left hand side of the "equation" to the expression 2x + 6y + 1. Since the right hand side of the original "equation" is not given, it is, in fact an expression and cannot be solved. In any case, one linear equation in two variables cannot be solved.
n - 10 + 9n - 3 n + 9n - 10 - 3 10n - 13