2/3x+9=3/4-7 please solve this question
Answers
Solve for x:
(2 x)/3 + 9 = 3/4 - 7
Put each term in (2 x)/3 + 9 over the common denominator 3: (2 x)/3 + 9 = (2 x)/3 + 27/3:
(2 x)/3 + 27/3 = 3/4 - 7
(2 x)/3 + 27/3 = (2 x + 27)/3:
1/3 (2 x + 27) = 3/4 - 7
Put 3/4 - 7 over the common denominator 4. 3/4 - 7 = 3/4 + (4 (-7))/4:
(2 x + 27)/3 = 3/4 - (7×4)/4
4 (-7) = -28:
(2 x + 27)/3 = 3/4 + (-28)/4
3/4 - 28/4 = (3 - 28)/4:
(2 x + 27)/3 = (3 - 28)/4
3 - 28 = -25:
(2 x + 27)/3 = (-25)/4
Multiply both sides of (2 x + 27)/3 = (-25)/4 by 3:
(3 (2 x + 27))/3 = (-253)/4
(3 (2 x + 27))/3 = 3/3×(2 x + 27) = 2 x + 27:
2 x + 27 = (-25×3)/4
3 (-25) = -75:
2 x + 27 = (-75)/4
Subtract 27 from both sides:
2 x + (27 - 27) = (-75)/4 - 27
27 - 27 = 0:
2 x = (-75)/4 - 27
Put (-75)/4 - 27 over the common denominator 4. (-75)/4 - 27 = (-75)/4 + (4 (-27))/4:
2 x = (-75)/4 - (27×4)/4
4 (-27) = -108:
2 x = (-108)/4 - 75/4
-75/4 - 108/4 = (-75 - 108)/4:
2 x = (-75 - 108)/4
-75 - 108 = -183:
2 x = (-183)/4
Divide both sides by 2:
x = ((-183)/2)/4
4×2 = 8:
Answer: |
| x = (-183)/8