Question

СРОЧНО 1) 7a - 2b + 3a - 4b =a=5 , b=32)4x - 2y - 8x + 6y =x=0,2 , y=0,43) 3xy × 4ax =4) -8ab × 2by =5) 5 ×( 4 - 2x) - 4x =6) -7 ×(5y - 8) + 56 =7) -9 ×( 4 - 3y) + 20y =8) -7 ×( 5 - 3x) - 21x =

Answer 1

1) 7а+3а-2b-4b=10a-6b=10*5-6*3=50-18=32
2) 4x-8x-2y+6y=-4x+4y=-4*0.2+4*0.4=-0.8+1.6=0.8
3) 3xy*4ax=12ax²y
4) -16ab²y
5) 20-10x-4x=20-14x
6) -35y+56+56=-35y+112
7) -36+27y+20y=-36+47y
8) -35+21x-21x=-35

Answer 2

Let's solve each equation step by step:

1. 7a - 2b + 3a - 4b = a = 5, b = 3 Combining like terms: 10a - 6b = 5 Now, we need more information to solve for both 'a' and 'b'.

2. 4x - 2y - 8x + 6y = x = 0.2, y = 0.4 Combining like terms: -4x + 4y = 0.2 We need more information to solve for both 'x' and 'y'.

3. 3xy × 4ax = ? This equation cannot be solved without specific values for 'x' and 'y'.

4. -8ab × 2by = ? This equation cannot be solved without specific values for 'a', 'b', 'x', and 'y'.

5. 5 × (4 - 2x) - 4x = ? Distribute the multiplication: 20 - 10x - 4x Combine like terms: 20 - 14x This equation cannot be solved without a specific value for 'x'.

6. -7 × (5y - 8) + 56 = ? Distribute the multiplication: -35y + 56 + 56 Combine like terms: -35y + 112 This equation cannot be solved without a specific value for 'y'.

7. -9 × (4 - 3y) + 20y = ? Distribute the multiplication: -36 + 27y + 20y Combine like terms: 47y - 36 This equation cannot be solved without a specific value for 'y'.

8. -7 × (5 - 3x) - 21x = ? Distribute the multiplication: -35 + 21x - 21x Combine like terms: -35 This equation can be simplified to -35, but it doesn't depend on 'x'.

In summary, equations 3, 4, 5, 6, 7, and 8 cannot be solved without specific values for the variables involved. Equations 1 and 2 also cannot be solved because they lack sufficient information to find the values of both variables. For equation 1, we can find either 'a' or 'b', but we need more information to find both. For equation 2, we can find either 'x' or 'y', but not both, with the given information.