Question

Simplifying Expression! Help Please!

Answer 1

Answer

1. $2a+3b-a=a+3b$

2. $(4x+3y)-(2x-5y)=2x+8y$

3. $-3(2x-1)-5=-6x-2$

4. $7xy-2xz+4xz-12xyz+2zx=7xy+4xz-12xyz$

5. $-3(2x-5)-4(x+7)=-10x-13$

Step-by-step-explanation

1. The given expression is $2a+3b-a$

Regroup the terms to obtain;

$=2a-a+3b$

Simplify to get;

$=a+3b$

2.  The given expression is $(4x+3y)-(2x-5y)$

Expand the brackets to get;

$=4x+3y-2x+5y$

Regroup the terms to get;

$=4x-2x+3y+5y$

Simplify

$=2x+8y$

3. The given expression is $-3(2x-1)-5$

Expand the brackets to get;

$=-6x+3-5$

Simplify;

$=-6x-2$

4. The given expression is $7xy-2xz+4xz-12xyz+2zx$

Regroup the terms to get;

$=7xy-2xz+2zx+4xz-12xyz$

Apply the commutative property of multiplication to get;

$=7xy-2xz+2xz+4xz-12xyz$

Simplify;

$=7xy+4xz-12xyz$

5. The given expression is $-3(2x-5)-4(x+7)$

Expand the brackets to get;

$=-6x+15-4x-28$

Regroup the terms to get;

$=-6x-4x-28+15$

Simplify;

$=-10x-13$