Download App

Algebraic Expressions and Identities — MATHS STD 8 — Question

Gujarat BoardEnglish MediumSTD 8MATHSAlgebraic Expressions and Identities3 Marks
Question
Simplify following: $[5 - 3x + 2y - (2x - y)] - (3x - 7y + 9)$
✓

Answer

$[5 - 3x + 2y - (2x- y)] - (3x - 7y + 9) $
$= [5 - 3x + 2y - 2x + y] - (3x - 7y + 9) $
$= [5 - 5x + 3y] - (3x - 7y + 9) $
$= 5 - 5x + 3y - 3x + 7y - 9 $
$= 5 - 9 - 5x - 3x + 3y + 7y $
$= -4 - 8x +10y$

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "3 Marks Question" from Algebraic Expressions and Identities→Algebraic Expressions and Identities — all question types→MATHS STD 8 question papers→Gujarat Board STD 8 question papers→Gujarat Board question paper generator→

Similar questions

Add the following algebric expressions: $\frac{7}{2}\text{x}^{3}-\frac{1}{2}\text{x}^{2}+\frac{5}{3},$$\frac{3}{2}\text{x}^{3}+\frac{7}{4}\text{x}^{2}-\text{x}+\frac{1}{3},$$\frac{3}{2}\text{x}^{2}-\frac{5}{2}\text{x}-2$
→
Find the smallest number by which 256 must be multiplied to obtain a perfect cube.
→
In what time will Rs. $1000$ amount to Rs. $1331$ at $10\%$ per annum, compound interest?
→
The sum of four consecutive numbers is 34. What are these numbers?
→
Show that the following integers are cubes of negative integers. Also, find the integer whose cube is the given integer. −$5832$
→
Find the areas of rectangles with the following pairs of monomials as their lengths and breadths respectively.
$(p, q),(10 m, 5 n),\left(20 x^2, 5 y^2\right),\left(4 x, 3 x^2\right),(3 m n, 4 n p)$
→
Simplify: $\big(\frac{4}{13}\big)^4\times\big(\frac{13}{7}\big)^2\times\big(\frac{7}{4}\big)^3$
→
Divide $150$ into three parts such that the second number is five-sixths the first and the third number is four-fifths the second.
→
Given that the number $\overline{67\text{y}19}$ is divisible by $9$, where y is a digit, what are the possible valuse of y?
→
A publesher gives $32\%$ discount on the printed price of a book to booksellers. What does a bookseller pay for a book whose printed price is Rs. $275?$
→