Question

1) 25(x+2)-4(y-3)-(25x4у+61)= 2)7,8(3х-5)+(80-39у)-0,3(10+78х-130у)=

Answer 1

1) 25(х+2)-4(y-3)-(25х4у+61)=25х+50-4у+12-25х4у-61=25х+1-4у-25х4у=25х+1-4у-100ху
2)7,8(3х-5)+(80-39у)-0,3(10+78х-130у)=23,4х-39+80-39у-30-23,4х+39у=80(остальные числа сократились)

Answer 2

Let's simplify each expression step by step:

1. 25(x+2) - 4(y-3) - (25x*4y + 61)

Step 1: Distribute the numbers outside the parentheses: = 25x + 50 - 4y + 12 - (100xy + 61)

Step 2: Combine like terms: = 25x - 4y + 62 - 100xy

So, the simplified expression is 25x - 4y + 62 - 100xy.

2. 7.8(3x-5) + (80 - 39y) - 0.3(10 + 78x - 130y)

Step 1: Distribute the numbers outside the parentheses: = 23.4x - 39 + 80 - 39y - 3 + 23.4x - 39y

Step 2: Combine like terms: = 46.8x - 39y + 38

So, the simplified expression is 46.8x - 39y + 38.