1.3x-7⁴=599

solution: 3x-2,401=599: +2,401 to both sides: divide three by both sides: x=1,000

2. 7x+7y=49, put into slope intercept form (y = mx + b)

solution: divide 7 from both sides and get x + y = 7, subtract x to get y = -x + 7

3. 256x+8⁴=8,192

solution: 256x+ 4,096=8,192: -4,096 from both sides: divide by 256 from both sides: x=16