Find the solution to each equation mentally or use your calculator. (Hint: do the opposite of the number on the left side of the equation) 30+a=40

500+b=200

−1+c=−2

d+3,567=0

PLEASE HELP WILL MARK BRAINLIEST

a=10

b=-300

c=-1

d=-3567

Step-by-step explanation:

For a, step 1: subtract 30 form both side of equation

For b, Step 1: Simplify both sides of the equation.

b+500=200

Step 2: Subtract 500 from both sides.

b+500−500=200−500

b=−300

For c, step 1: Simplify both sides of the equation.

c−1=−2

Step 2: Add 1 to both sides.

c−1+1=−2+1

c=−1

for d,  Subtract 3567 from both sides.

d+3567−3567=0−3567

d=−3567

step-by-step explanation: