2. 14x+15x, or 29x (simplified form)
3. 27x+5x, or 32x (simplified form)
4. 64x+6x, or 70x (simplified form)
Hope this helps.
I dont really know if this is right myself, but i'm just using the skills my teacher thought me.
First one:
2x + y = -7-1
2x + x + 10 = -8
3x + 10 = -8
3x = -18
x= -6
Idk the second one. SOOORRRYYY!
B irrational numbers true or false
All you have to do is add like terms,
3.2x +(-5.6x)= -2.4x
-6+4= -2
Anyway, answer is
-2.4x-2