a) 6x - 5y = 10x + 7 SOLVING FOR X:
6x-5y=10x+7
−5y=10x+7−6x
−5y=4x+7
−5y−7=4x next divide both sides by four and switch sides


a) 6x - 5y = 10x + 7 SOLVING FOR Y:
6x-5y=10x+7
−5y=10x+7−6x then simplify
−5y=4x+7, now divide both sides by negative five

b) -4 +(-3) -(-9)
-4+(-3)-(-9) Remove parentheses and simplify.
−4−3+9=−7+9=2
Hope this helps, now you know the answer and how to do it. HAVE A BLESSED AND WONDERFUL DAY! :-)
- Cutiepatutie ☺❀❤