The Simplification of each of the expressions has been given below. The solution to the simultaneous equation using substitution method is x = -8, y = -16
Simplification
(5³)(5^7)
= (75)(78,125)
= 5,859,375
(x^5)(x^-10)
= x^(5-10)
= x^-5
-8x³y^6 / 4x^5y^4
= -8x³y^6 - 4x^5y^4
= -12x^(3-5)y^(6-4)
= -12x²y²
2x - 9 + 4x + 1
= 6x - 8
(5v² - 9v) + (4v + 8)
= 5v² - 9v + 4v + 8
= 5v² - 5v + 8
8(-6y + 9)
= -48y + 72
(4r - 3) (4r + 3)
= 16r² + 12r - 12r - 9
= 16r² - 9
6x -7 = x + 8
6x - x = 8 + 7
5x = 15
x = 15/5
x = 3
2(3x - 4) - 2x = 2(x - 7)
6x - 8 - 2x = 2x - 14
4x - 8 = 2x - 14
4x - 2x = -14 + 8
2x = -6
x = -6/2
x = -3
y = x - 8
y = 2x
y = x - 8
2x = x - 8
2x - x = -8
x = -8
y = 2x
y = 2(-8)
y = -16
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