To solve these equations:
1) 430 - x = 720Subtract 430 from both sides:-x = 720 - 430-x = 290Divide by -1 to solve for x:x = -290
2) y + 380 = 720Subtract 380 from both sides:y = 720 - 380y = 340
3) 640 + x = 900Subtract 640 from both sides:x = 900 - 640x = 260
4) y - 760 = 520Add 760 to both sides:y = 520 + 760y = 1280
Therefore, the solutions to the equations are:1) x = -2902) y = 3403) x = 2604) y = 1280
To solve these equations:
1) 430 - x = 720
Subtract 430 from both sides:
-x = 720 - 430
-x = 290
Divide by -1 to solve for x:
x = -290
2) y + 380 = 720
Subtract 380 from both sides:
y = 720 - 380
y = 340
3) 640 + x = 900
Subtract 640 from both sides:
x = 900 - 640
x = 260
4) y - 760 = 520
Add 760 to both sides:
y = 520 + 760
y = 1280
Therefore, the solutions to the equations are:
1) x = -290
2) y = 340
3) x = 260
4) y = 1280