Question

Find the sum.
−12(7z+4)+15(5z−15)

Answer 1

Use distributive property a(b + c) = ab + ac:

-12(7z + 4) + 15(5z - 15)

= (-12)(7z) + (-12)(4) + (15)(5z) + (15)(-15)

= -84z - 48 + 75z - 225

Combine like terms

= (-84z + 75z) + (-48 - 225)

= -9z - 273

Answer: -12(7z + 4) + 15(5z - 15) = -9z - 273

Answer 2

To find the answer:

-12(7z+4)+15(5z-15)

=[(-12)×7z]+[4x(-12)]+[15×5z]-[15×15]

=-84z-48+75z-225

=-84z+75z-48-225

=-9z-273

=-3(3z+91)

Therefore, the answer is -3(3z+91).

Hope it helps!